./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/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_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/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_e00708fc-cf45-4087-8b26-53c817add10d/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 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:29:08,951 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:29:09,027 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-06 22:29:09,033 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:29:09,033 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:29:09,059 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:29:09,059 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:29:09,060 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:29:09,061 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:29:09,061 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:29:09,062 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:29:09,063 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:29:09,063 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:29:09,064 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:29:09,064 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:29:09,065 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:29:09,065 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:29:09,066 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:29:09,066 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:29:09,067 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:29:09,067 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:29:09,068 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:29:09,069 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-06 22:29:09,069 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:29:09,070 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:29:09,070 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:29:09,070 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:29:09,071 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:29:09,071 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:29:09,072 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:29:09,072 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:29:09,073 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:29:09,073 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:29:09,074 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:29:09,074 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:29:09,075 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:29:09,075 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:29:09,075 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:29:09,076 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:29:09,076 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:29:09,077 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:29:09,077 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_e00708fc-cf45-4087-8b26-53c817add10d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df [2023-11-06 22:29:09,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:29:09,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:29:09,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:29:09,445 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:29:09,445 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:29:09,447 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-06 22:29:12,672 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:29:12,940 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:29:12,941 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-06 22:29:12,951 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/data/531f05683/1585e113258e48b28fd4be2a429f5f4c/FLAG9b7949ae0 [2023-11-06 22:29:12,969 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/data/531f05683/1585e113258e48b28fd4be2a429f5f4c [2023-11-06 22:29:12,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:29:12,974 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:29:12,976 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:29:12,977 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:29:12,983 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:29:12,984 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:12" (1/1) ... [2023-11-06 22:29:12,986 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ff7e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:12, skipping insertion in model container [2023-11-06 22:29:12,986 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:12" (1/1) ... [2023-11-06 22:29:13,027 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:29:13,260 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:29:13,273 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:29:13,308 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:29:13,318 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:29:13,319 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:29:13,326 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:29:13,327 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:13 WrapperNode [2023-11-06 22:29:13,327 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:29:13,329 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:29:13,329 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:29:13,329 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:29:13,336 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:13" (1/1) ... [2023-11-06 22:29:13,347 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:13" (1/1) ... [2023-11-06 22:29:13,383 INFO L138 Inliner]: procedures = 24, calls = 40, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 173 [2023-11-06 22:29:13,384 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:29:13,384 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:29:13,385 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:29:13,385 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:29:13,396 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:13" (1/1) ... [2023-11-06 22:29:13,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:13" (1/1) ... [2023-11-06 22:29:13,400 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:13" (1/1) ... [2023-11-06 22:29:13,401 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:13" (1/1) ... [2023-11-06 22:29:13,410 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:13" (1/1) ... [2023-11-06 22:29:13,415 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:13" (1/1) ... [2023-11-06 22:29:13,418 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:13" (1/1) ... [2023-11-06 22:29:13,420 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:13" (1/1) ... [2023-11-06 22:29:13,424 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:29:13,425 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:29:13,425 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:29:13,425 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:29:13,426 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:13" (1/1) ... [2023-11-06 22:29:13,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:29:13,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:13,467 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:29:13,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:29:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:29:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:29:13,529 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:29:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:29:13,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:29:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:29:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:29:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:29:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:29:13,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:29:13,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:29:13,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:29:13,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:29:13,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:29:13,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:29:13,533 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 22:29:13,650 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:29:13,653 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:29:14,198 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:29:14,374 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:29:14,374 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:29:14,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:14 BoogieIcfgContainer [2023-11-06 22:29:14,377 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:29:14,380 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:29:14,380 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:29:14,384 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:29:14,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:29:12" (1/3) ... [2023-11-06 22:29:14,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1a7047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:14, skipping insertion in model container [2023-11-06 22:29:14,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:13" (2/3) ... [2023-11-06 22:29:14,386 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1a7047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:14, skipping insertion in model container [2023-11-06 22:29:14,386 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:14" (3/3) ... [2023-11-06 22:29:14,388 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2023-11-06 22:29:14,398 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:29:14,408 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:29:14,409 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-11-06 22:29:14,409 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:29:14,520 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:29:14,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 158 transitions, 330 flow [2023-11-06 22:29:14,661 INFO L124 PetriNetUnfolderBase]: 11/156 cut-off events. [2023-11-06 22:29:14,661 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:29:14,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 156 events. 11/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 148 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 113. Up to 3 conditions per place. [2023-11-06 22:29:14,669 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 158 transitions, 330 flow [2023-11-06 22:29:14,678 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 134 transitions, 277 flow [2023-11-06 22:29:14,683 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:29:14,697 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 134 transitions, 277 flow [2023-11-06 22:29:14,701 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 134 transitions, 277 flow [2023-11-06 22:29:14,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 134 transitions, 277 flow [2023-11-06 22:29:14,753 INFO L124 PetriNetUnfolderBase]: 10/134 cut-off events. [2023-11-06 22:29:14,753 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:29:14,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 134 events. 10/134 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 143 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 113. Up to 3 conditions per place. [2023-11-06 22:29:14,758 INFO L119 LiptonReduction]: Number of co-enabled transitions 1192 [2023-11-06 22:29:22,249 INFO L134 LiptonReduction]: Checked pairs total: 1491 [2023-11-06 22:29:22,249 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-11-06 22:29:22,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:29:22,296 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;@d6423f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:29:22,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-11-06 22:29:22,306 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:29:22,306 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:29:22,306 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:29:22,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:22,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:29:22,308 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:22,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:22,317 INFO L85 PathProgramCache]: Analyzing trace with hash 23297, now seen corresponding path program 1 times [2023-11-06 22:29:22,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:22,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399611823] [2023-11-06 22:29:22,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:22,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:22,636 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 22:29:22,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:22,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399611823] [2023-11-06 22:29:22,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399611823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:29:22,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:29:22,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:29:22,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236352428] [2023-11-06 22:29:22,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:22,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:29:22,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:22,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:29:22,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:29:22,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 309 [2023-11-06 22:29:22,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:22,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:22,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 309 [2023-11-06 22:29:22,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:22,940 INFO L124 PetriNetUnfolderBase]: 247/362 cut-off events. [2023-11-06 22:29:22,941 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-06 22:29:22,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 362 events. 247/362 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 1366 event pairs, 110 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 651. Up to 355 conditions per place. [2023-11-06 22:29:22,949 INFO L140 encePairwiseOnDemand]: 301/309 looper letters, 21 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2023-11-06 22:29:22,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 26 transitions, 109 flow [2023-11-06 22:29:22,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:29:22,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:29:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2023-11-06 22:29:22,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4552319309600863 [2023-11-06 22:29:22,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2023-11-06 22:29:22,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2023-11-06 22:29:23,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:23,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2023-11-06 22:29:23,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 22:29:23,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 22:29:23,035 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 22:29:23,038 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 63 flow. Second operand 3 states and 422 transitions. [2023-11-06 22:29:23,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 26 transitions, 109 flow [2023-11-06 22:29:23,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 26 transitions, 104 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:29:23,046 INFO L231 Difference]: Finished difference. Result has 28 places, 26 transitions, 73 flow [2023-11-06 22:29:23,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=28, PETRI_TRANSITIONS=26} [2023-11-06 22:29:23,053 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2023-11-06 22:29:23,053 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 26 transitions, 73 flow [2023-11-06 22:29:23,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:23,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:23,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:29:23,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:29:23,055 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:23,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:23,055 INFO L85 PathProgramCache]: Analyzing trace with hash 723587, now seen corresponding path program 1 times [2023-11-06 22:29:23,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:23,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378090852] [2023-11-06 22:29:23,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:23,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:23,141 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 22:29:23,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:23,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378090852] [2023-11-06 22:29:23,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378090852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:29:23,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:29:23,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:29:23,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988135875] [2023-11-06 22:29:23,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:23,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:29:23,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:23,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:29:23,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:29:23,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 309 [2023-11-06 22:29:23,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:23,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:23,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 309 [2023-11-06 22:29:23,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:23,286 INFO L124 PetriNetUnfolderBase]: 247/361 cut-off events. [2023-11-06 22:29:23,286 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:29:23,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 361 events. 247/361 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 1347 event pairs, 110 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 718. Up to 351 conditions per place. [2023-11-06 22:29:23,290 INFO L140 encePairwiseOnDemand]: 306/309 looper letters, 20 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2023-11-06 22:29:23,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 115 flow [2023-11-06 22:29:23,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:29:23,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:29:23,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-11-06 22:29:23,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447680690399137 [2023-11-06 22:29:23,294 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-11-06 22:29:23,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-11-06 22:29:23,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:23,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-11-06 22:29:23,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 22:29:23,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 22:29:23,301 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 22:29:23,301 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 73 flow. Second operand 3 states and 415 transitions. [2023-11-06 22:29:23,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 115 flow [2023-11-06 22:29:23,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 25 transitions, 110 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:29:23,303 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 70 flow [2023-11-06 22:29:23,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-11-06 22:29:23,304 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2023-11-06 22:29:23,304 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 70 flow [2023-11-06 22:29:23,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:23,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:23,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:29:23,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:29:23,306 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:23,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:23,306 INFO L85 PathProgramCache]: Analyzing trace with hash 723588, now seen corresponding path program 1 times [2023-11-06 22:29:23,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:23,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871579491] [2023-11-06 22:29:23,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:23,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:23,392 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 22:29:23,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:23,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871579491] [2023-11-06 22:29:23,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871579491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:23,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987126760] [2023-11-06 22:29:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:23,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:23,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:23,404 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:23,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:29:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:23,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:29:23,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:23,572 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 22:29:23,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:29:23,619 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 22:29:23,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987126760] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:29:23,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:29:23,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 22:29:23,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683275353] [2023-11-06 22:29:23,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:29:23,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:29:23,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:23,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:29:23,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:29:23,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 309 [2023-11-06 22:29:23,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states 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 22:29:23,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:23,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 309 [2023-11-06 22:29:23,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:23,791 INFO L124 PetriNetUnfolderBase]: 250/367 cut-off events. [2023-11-06 22:29:23,791 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:29:23,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 367 events. 250/367 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 1387 event pairs, 110 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 718. Up to 357 conditions per place. [2023-11-06 22:29:23,795 INFO L140 encePairwiseOnDemand]: 305/309 looper letters, 20 selfloop transitions, 9 changer transitions 0/31 dead transitions. [2023-11-06 22:29:23,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 31 transitions, 158 flow [2023-11-06 22:29:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:29:23,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:29:23,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 818 transitions. [2023-11-06 22:29:23,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412081984897519 [2023-11-06 22:29:23,800 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 818 transitions. [2023-11-06 22:29:23,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 818 transitions. [2023-11-06 22:29:23,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:23,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 818 transitions. [2023-11-06 22:29:23,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.33333333333334) internal successors, (818), 6 states have internal predecessors, (818), 0 states have call successors, (0), 0 states 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 22:29:23,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 309.0) internal successors, (2163), 7 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states 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 22:29:23,811 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 309.0) internal successors, (2163), 7 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states 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 22:29:23,811 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 70 flow. Second operand 6 states and 818 transitions. [2023-11-06 22:29:23,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 31 transitions, 158 flow [2023-11-06 22:29:23,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:29:23,813 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 125 flow [2023-11-06 22:29:23,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=125, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-11-06 22:29:23,814 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-11-06 22:29:23,814 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 125 flow [2023-11-06 22:29:23,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states 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 22:29:23,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:23,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:29:23,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:24,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:24,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:24,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:24,023 INFO L85 PathProgramCache]: Analyzing trace with hash 695503583, now seen corresponding path program 1 times [2023-11-06 22:29:24,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:24,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143927919] [2023-11-06 22:29:24,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:24,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:24,103 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 22:29:24,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:24,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143927919] [2023-11-06 22:29:24,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143927919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:29:24,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:29:24,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:29:24,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661904804] [2023-11-06 22:29:24,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:24,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:29:24,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:24,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:29:24,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:29:24,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 309 [2023-11-06 22:29:24,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 22:29:24,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:24,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 309 [2023-11-06 22:29:24,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:24,267 INFO L124 PetriNetUnfolderBase]: 279/424 cut-off events. [2023-11-06 22:29:24,267 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:29:24,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 901 conditions, 424 events. 279/424 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 1727 event pairs, 114 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 865. Up to 338 conditions per place. [2023-11-06 22:29:24,273 INFO L140 encePairwiseOnDemand]: 303/309 looper letters, 38 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2023-11-06 22:29:24,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 235 flow [2023-11-06 22:29:24,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:29:24,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:29:24,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2023-11-06 22:29:24,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4692556634304207 [2023-11-06 22:29:24,277 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2023-11-06 22:29:24,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2023-11-06 22:29:24,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:24,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2023-11-06 22:29:24,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 22:29:24,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 22:29:24,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 22:29:24,284 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 125 flow. Second operand 3 states and 435 transitions. [2023-11-06 22:29:24,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 235 flow [2023-11-06 22:29:24,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 214 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-06 22:29:24,288 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 132 flow [2023-11-06 22:29:24,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2023-11-06 22:29:24,289 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-11-06 22:29:24,289 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 132 flow [2023-11-06 22:29:24,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 22:29:24,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:24,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:29:24,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:29:24,291 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:24,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:24,292 INFO L85 PathProgramCache]: Analyzing trace with hash 85776389, now seen corresponding path program 1 times [2023-11-06 22:29:24,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:24,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024149497] [2023-11-06 22:29:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:24,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:24,419 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 22:29:24,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:24,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024149497] [2023-11-06 22:29:24,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024149497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:29:24,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:29:24,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:29:24,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095834203] [2023-11-06 22:29:24,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:24,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:29:24,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:24,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:29:24,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:29:24,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 309 [2023-11-06 22:29:24,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states 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 22:29:24,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:24,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 309 [2023-11-06 22:29:24,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:24,644 INFO L124 PetriNetUnfolderBase]: 237/376 cut-off events. [2023-11-06 22:29:24,644 INFO L125 PetriNetUnfolderBase]: For 37/52 co-relation queries the response was YES. [2023-11-06 22:29:24,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 376 events. 237/376 cut-off events. For 37/52 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 1528 event pairs, 128 based on Foata normal form. 25/202 useless extension candidates. Maximal degree in co-relation 905. Up to 362 conditions per place. [2023-11-06 22:29:24,650 INFO L140 encePairwiseOnDemand]: 297/309 looper letters, 29 selfloop transitions, 2 changer transitions 5/38 dead transitions. [2023-11-06 22:29:24,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 215 flow [2023-11-06 22:29:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:29:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:29:24,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 548 transitions. [2023-11-06 22:29:24,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44336569579288027 [2023-11-06 22:29:24,654 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 548 transitions. [2023-11-06 22:29:24,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 548 transitions. [2023-11-06 22:29:24,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:24,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 548 transitions. [2023-11-06 22:29:24,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states 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 22:29:24,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 309.0) internal successors, (1545), 5 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states 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 22:29:24,662 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 309.0) internal successors, (1545), 5 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states 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 22:29:24,662 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 132 flow. Second operand 4 states and 548 transitions. [2023-11-06 22:29:24,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 215 flow [2023-11-06 22:29:24,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:29:24,665 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 145 flow [2023-11-06 22:29:24,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-11-06 22:29:24,666 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2023-11-06 22:29:24,666 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 145 flow [2023-11-06 22:29:24,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states 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 22:29:24,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:24,667 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:29:24,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:29:24,668 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:24,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:24,668 INFO L85 PathProgramCache]: Analyzing trace with hash 82914178, now seen corresponding path program 2 times [2023-11-06 22:29:24,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:24,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740925873] [2023-11-06 22:29:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:24,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:24,818 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 22:29:24,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:24,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740925873] [2023-11-06 22:29:24,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740925873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:24,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503779408] [2023-11-06 22:29:24,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:29:24,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:24,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:24,828 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:24,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:29:24,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:29:24,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:29:24,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:29:24,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:24,928 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 22:29:24,928 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:29:24,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503779408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:29:24,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:29:24,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-06 22:29:24,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48448376] [2023-11-06 22:29:24,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:24,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:29:24,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:24,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:29:24,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:29:24,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 309 [2023-11-06 22:29:24,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:24,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:24,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 309 [2023-11-06 22:29:24,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:25,041 INFO L124 PetriNetUnfolderBase]: 242/373 cut-off events. [2023-11-06 22:29:25,042 INFO L125 PetriNetUnfolderBase]: For 80/93 co-relation queries the response was YES. [2023-11-06 22:29:25,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1109 conditions, 373 events. 242/373 cut-off events. For 80/93 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 1535 event pairs, 129 based on Foata normal form. 12/179 useless extension candidates. Maximal degree in co-relation 1091. Up to 362 conditions per place. [2023-11-06 22:29:25,046 INFO L140 encePairwiseOnDemand]: 306/309 looper letters, 25 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-11-06 22:29:25,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 32 transitions, 195 flow [2023-11-06 22:29:25,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:29:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:29:25,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-11-06 22:29:25,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45307443365695793 [2023-11-06 22:29:25,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-11-06 22:29:25,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-11-06 22:29:25,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:25,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-11-06 22:29:25,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:25,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 22:29:25,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 22:29:25,054 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 145 flow. Second operand 3 states and 420 transitions. [2023-11-06 22:29:25,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 32 transitions, 195 flow [2023-11-06 22:29:25,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 176 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-11-06 22:29:25,057 INFO L231 Difference]: Finished difference. Result has 33 places, 32 transitions, 126 flow [2023-11-06 22:29:25,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=33, PETRI_TRANSITIONS=32} [2023-11-06 22:29:25,058 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-11-06 22:29:25,058 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 32 transitions, 126 flow [2023-11-06 22:29:25,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:25,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:25,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:29:25,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:25,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:25,269 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:25,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:25,269 INFO L85 PathProgramCache]: Analyzing trace with hash 83006447, now seen corresponding path program 1 times [2023-11-06 22:29:25,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:25,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822267283] [2023-11-06 22:29:25,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:25,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:25,396 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 22:29:25,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:25,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822267283] [2023-11-06 22:29:25,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822267283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:25,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401523226] [2023-11-06 22:29:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:25,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:25,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:25,399 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:25,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:29:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:25,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:29:25,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:25,505 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 22:29:25,505 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:29:25,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401523226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:29:25,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:29:25,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-11-06 22:29:25,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652765385] [2023-11-06 22:29:25,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:25,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:29:25,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:25,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:29:25,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:29:25,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 309 [2023-11-06 22:29:25,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 22:29:25,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:25,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 309 [2023-11-06 22:29:25,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:25,596 INFO L124 PetriNetUnfolderBase]: 130/207 cut-off events. [2023-11-06 22:29:25,596 INFO L125 PetriNetUnfolderBase]: For 63/72 co-relation queries the response was YES. [2023-11-06 22:29:25,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 207 events. 130/207 cut-off events. For 63/72 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 717 event pairs, 65 based on Foata normal form. 30/129 useless extension candidates. Maximal degree in co-relation 574. Up to 203 conditions per place. [2023-11-06 22:29:25,599 INFO L140 encePairwiseOnDemand]: 305/309 looper letters, 25 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-11-06 22:29:25,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 160 flow [2023-11-06 22:29:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:29:25,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:29:25,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2023-11-06 22:29:25,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4552319309600863 [2023-11-06 22:29:25,602 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2023-11-06 22:29:25,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2023-11-06 22:29:25,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:25,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2023-11-06 22:29:25,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 22:29:25,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 22:29:25,608 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 22:29:25,609 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 126 flow. Second operand 3 states and 422 transitions. [2023-11-06 22:29:25,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 160 flow [2023-11-06 22:29:25,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 148 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-06 22:29:25,612 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 98 flow [2023-11-06 22:29:25,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2023-11-06 22:29:25,613 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2023-11-06 22:29:25,614 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 98 flow [2023-11-06 22:29:25,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 22:29:25,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:25,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:25,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:25,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:25,821 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:25,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:25,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1721764196, now seen corresponding path program 1 times [2023-11-06 22:29:25,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:25,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962629222] [2023-11-06 22:29:25,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:25,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:25,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:25,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962629222] [2023-11-06 22:29:25,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962629222] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:25,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181740865] [2023-11-06 22:29:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:25,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:25,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:25,904 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:25,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:29:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:26,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:29:26,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:29:26,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:29:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:29:26,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181740865] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:29:26,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:29:26,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2023-11-06 22:29:26,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818585378] [2023-11-06 22:29:26,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:29:26,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:29:26,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:26,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:29:26,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:29:26,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 309 [2023-11-06 22:29:26,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 98 flow. Second operand has 11 states, 11 states have (on average 122.72727272727273) internal successors, (1350), 11 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states 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 22:29:26,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:26,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 309 [2023-11-06 22:29:26,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:26,704 INFO L124 PetriNetUnfolderBase]: 281/441 cut-off events. [2023-11-06 22:29:26,704 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-11-06 22:29:26,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1262 conditions, 441 events. 281/441 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 1807 event pairs, 29 based on Foata normal form. 28/264 useless extension candidates. Maximal degree in co-relation 1252. Up to 229 conditions per place. [2023-11-06 22:29:26,710 INFO L140 encePairwiseOnDemand]: 297/309 looper letters, 59 selfloop transitions, 20 changer transitions 5/85 dead transitions. [2023-11-06 22:29:26,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 85 transitions, 466 flow [2023-11-06 22:29:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:29:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:29:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1418 transitions. [2023-11-06 22:29:26,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41718152397764047 [2023-11-06 22:29:26,719 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1418 transitions. [2023-11-06 22:29:26,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1418 transitions. [2023-11-06 22:29:26,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:26,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1418 transitions. [2023-11-06 22:29:26,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 128.9090909090909) internal successors, (1418), 11 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states 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 22:29:26,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 309.0) internal successors, (3708), 12 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states 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 22:29:26,739 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 309.0) internal successors, (3708), 12 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states 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 22:29:26,739 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 98 flow. Second operand 11 states and 1418 transitions. [2023-11-06 22:29:26,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 85 transitions, 466 flow [2023-11-06 22:29:26,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 85 transitions, 465 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:29:26,744 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 246 flow [2023-11-06 22:29:26,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=246, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-11-06 22:29:26,745 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2023-11-06 22:29:26,745 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 246 flow [2023-11-06 22:29:26,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 122.72727272727273) internal successors, (1350), 11 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states 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 22:29:26,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:26,747 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-11-06 22:29:26,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:26,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:26,954 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:26,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:26,955 INFO L85 PathProgramCache]: Analyzing trace with hash 580150655, now seen corresponding path program 1 times [2023-11-06 22:29:26,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:26,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468175987] [2023-11-06 22:29:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:26,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:29:27,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:27,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468175987] [2023-11-06 22:29:27,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468175987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:29:27,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:29:27,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:29:27,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736413583] [2023-11-06 22:29:27,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:27,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:29:27,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:27,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:29:27,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:29:27,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 309 [2023-11-06 22:29:27,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 22:29:27,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:27,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 309 [2023-11-06 22:29:27,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:27,174 INFO L124 PetriNetUnfolderBase]: 246/394 cut-off events. [2023-11-06 22:29:27,174 INFO L125 PetriNetUnfolderBase]: For 339/343 co-relation queries the response was YES. [2023-11-06 22:29:27,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1685 conditions, 394 events. 246/394 cut-off events. For 339/343 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 1601 event pairs, 45 based on Foata normal form. 28/254 useless extension candidates. Maximal degree in co-relation 1669. Up to 211 conditions per place. [2023-11-06 22:29:27,181 INFO L140 encePairwiseOnDemand]: 306/309 looper letters, 38 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2023-11-06 22:29:27,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 360 flow [2023-11-06 22:29:27,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:29:27,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:29:27,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2023-11-06 22:29:27,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738942826321466 [2023-11-06 22:29:27,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2023-11-06 22:29:27,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2023-11-06 22:29:27,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:27,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2023-11-06 22:29:27,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 22:29:27,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 22:29:27,191 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 22:29:27,191 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 246 flow. Second operand 3 states and 424 transitions. [2023-11-06 22:29:27,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 360 flow [2023-11-06 22:29:27,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 46 transitions, 320 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-11-06 22:29:27,199 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 204 flow [2023-11-06 22:29:27,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-11-06 22:29:27,201 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2023-11-06 22:29:27,202 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 204 flow [2023-11-06 22:29:27,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 22:29:27,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:27,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:27,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:29:27,203 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:27,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:27,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1830827185, now seen corresponding path program 1 times [2023-11-06 22:29:27,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:27,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028008767] [2023-11-06 22:29:27,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:27,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:27,290 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 22:29:27,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:27,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028008767] [2023-11-06 22:29:27,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028008767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:29:27,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:29:27,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:29:27,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189105123] [2023-11-06 22:29:27,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:27,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:29:27,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:27,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:29:27,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:29:27,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 309 [2023-11-06 22:29:27,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states 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 22:29:27,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:27,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 309 [2023-11-06 22:29:27,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:27,415 INFO L124 PetriNetUnfolderBase]: 177/288 cut-off events. [2023-11-06 22:29:27,415 INFO L125 PetriNetUnfolderBase]: For 428/440 co-relation queries the response was YES. [2023-11-06 22:29:27,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1215 conditions, 288 events. 177/288 cut-off events. For 428/440 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1008 event pairs, 32 based on Foata normal form. 18/195 useless extension candidates. Maximal degree in co-relation 1200. Up to 267 conditions per place. [2023-11-06 22:29:27,439 INFO L140 encePairwiseOnDemand]: 302/309 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-11-06 22:29:27,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 239 flow [2023-11-06 22:29:27,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:29:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:29:27,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2023-11-06 22:29:27,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45415318230852214 [2023-11-06 22:29:27,443 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2023-11-06 22:29:27,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2023-11-06 22:29:27,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:27,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2023-11-06 22:29:27,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 22:29:27,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 22:29:27,450 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 22:29:27,450 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 204 flow. Second operand 3 states and 421 transitions. [2023-11-06 22:29:27,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 239 flow [2023-11-06 22:29:27,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 223 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 22:29:27,455 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 174 flow [2023-11-06 22:29:27,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2023-11-06 22:29:27,457 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2023-11-06 22:29:27,457 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 174 flow [2023-11-06 22:29:27,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states 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 22:29:27,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:27,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-11-06 22:29:27,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:29:27,460 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:27,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:27,461 INFO L85 PathProgramCache]: Analyzing trace with hash 580150691, now seen corresponding path program 2 times [2023-11-06 22:29:27,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:27,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009475049] [2023-11-06 22:29:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:27,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:29:27,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:27,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009475049] [2023-11-06 22:29:27,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009475049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:27,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940374963] [2023-11-06 22:29:27,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:29:27,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:27,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:27,584 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:27,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:29:27,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:29:27,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:29:27,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:29:27,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:29:27,721 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:29:27,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940374963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:29:27,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:29:27,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-11-06 22:29:27,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583586811] [2023-11-06 22:29:27,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:27,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:29:27,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:27,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:29:27,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:29:27,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 309 [2023-11-06 22:29:27,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 22:29:27,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:27,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 309 [2023-11-06 22:29:27,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:27,807 INFO L124 PetriNetUnfolderBase]: 136/235 cut-off events. [2023-11-06 22:29:27,807 INFO L125 PetriNetUnfolderBase]: For 306/311 co-relation queries the response was YES. [2023-11-06 22:29:27,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 235 events. 136/235 cut-off events. For 306/311 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 901 event pairs, 54 based on Foata normal form. 5/153 useless extension candidates. Maximal degree in co-relation 1039. Up to 227 conditions per place. [2023-11-06 22:29:27,811 INFO L140 encePairwiseOnDemand]: 307/309 looper letters, 26 selfloop transitions, 1 changer transitions 1/31 dead transitions. [2023-11-06 22:29:27,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 31 transitions, 222 flow [2023-11-06 22:29:27,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:29:27,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:29:27,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-11-06 22:29:27,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45091693635382957 [2023-11-06 22:29:27,815 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-11-06 22:29:27,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-11-06 22:29:27,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:27,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-11-06 22:29:27,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states 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 22:29:27,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 22:29:27,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 22:29:27,823 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 174 flow. Second operand 3 states and 418 transitions. [2023-11-06 22:29:27,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 31 transitions, 222 flow [2023-11-06 22:29:27,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 31 transitions, 183 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-11-06 22:29:27,827 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 125 flow [2023-11-06 22:29:27,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-11-06 22:29:27,828 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-11-06 22:29:27,828 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 125 flow [2023-11-06 22:29:27,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 22:29:27,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:27,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:27,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:28,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:28,036 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:28,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:28,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1706235847, now seen corresponding path program 1 times [2023-11-06 22:29:28,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:28,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967269122] [2023-11-06 22:29:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:28,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:28,604 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 22:29:28,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:28,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967269122] [2023-11-06 22:29:28,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967269122] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:28,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13411524] [2023-11-06 22:29:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:28,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:28,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:28,607 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:28,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:29:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:28,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:29:28,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:28,829 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:29:28,913 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:29:29,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:29,071 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:29:29,173 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 22:29:29,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:29:29,623 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:29,624 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2023-11-06 22:29:29,642 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:29,642 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 104 [2023-11-06 22:29:29,675 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:29,677 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 59 [2023-11-06 22:29:29,689 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 54 [2023-11-06 22:29:29,916 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 22:29:29,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13411524] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:29:29,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:29:29,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-06 22:29:29,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699757493] [2023-11-06 22:29:29,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:29:29,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:29:29,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:29,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:29:29,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:29:31,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 309 [2023-11-06 22:29:31,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 125 flow. Second operand has 17 states, 17 states have (on average 109.41176470588235) internal successors, (1860), 17 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states 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 22:29:31,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:31,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 309 [2023-11-06 22:29:31,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:32,120 INFO L124 PetriNetUnfolderBase]: 111/198 cut-off events. [2023-11-06 22:29:32,120 INFO L125 PetriNetUnfolderBase]: For 108/112 co-relation queries the response was YES. [2023-11-06 22:29:32,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 198 events. 111/198 cut-off events. For 108/112 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 649 event pairs, 27 based on Foata normal form. 8/149 useless extension candidates. Maximal degree in co-relation 622. Up to 140 conditions per place. [2023-11-06 22:29:32,122 INFO L140 encePairwiseOnDemand]: 300/309 looper letters, 35 selfloop transitions, 18 changer transitions 6/62 dead transitions. [2023-11-06 22:29:32,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 344 flow [2023-11-06 22:29:32,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:29:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:29:32,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1573 transitions. [2023-11-06 22:29:32,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36361534905224224 [2023-11-06 22:29:32,131 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1573 transitions. [2023-11-06 22:29:32,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1573 transitions. [2023-11-06 22:29:32,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:32,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1573 transitions. [2023-11-06 22:29:32,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 112.35714285714286) internal successors, (1573), 14 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states 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 22:29:32,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 309.0) internal successors, (4635), 15 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states 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 22:29:32,148 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 309.0) internal successors, (4635), 15 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states 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 22:29:32,148 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 125 flow. Second operand 14 states and 1573 transitions. [2023-11-06 22:29:32,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 344 flow [2023-11-06 22:29:32,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 62 transitions, 343 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:29:32,152 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 234 flow [2023-11-06 22:29:32,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=234, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-11-06 22:29:32,155 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 23 predicate places. [2023-11-06 22:29:32,155 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 234 flow [2023-11-06 22:29:32,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 109.41176470588235) internal successors, (1860), 17 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states 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 22:29:32,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:32,156 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:32,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:32,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:32,363 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:32,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:32,363 INFO L85 PathProgramCache]: Analyzing trace with hash -832625290, now seen corresponding path program 1 times [2023-11-06 22:29:32,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:32,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468638358] [2023-11-06 22:29:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:32,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:29:33,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:33,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468638358] [2023-11-06 22:29:33,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468638358] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:33,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890492519] [2023-11-06 22:29:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:33,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:33,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:33,435 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:33,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:29:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:33,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:29:33,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:33,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:33,727 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:29:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:33,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:29:33,861 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:33,861 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2023-11-06 22:29:33,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:29:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:29:33,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890492519] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:33,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:29:33,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 15 [2023-11-06 22:29:33,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349453455] [2023-11-06 22:29:33,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:33,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:29:33,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:33,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:29:33,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=227, Unknown=2, NotChecked=0, Total=272 [2023-11-06 22:29:34,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 309 [2023-11-06 22:29:34,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 234 flow. Second operand has 6 states, 6 states have (on average 112.33333333333333) internal successors, (674), 6 states have internal predecessors, (674), 0 states have call successors, (0), 0 states 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 22:29:34,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:34,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 309 [2023-11-06 22:29:34,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:34,289 INFO L124 PetriNetUnfolderBase]: 118/211 cut-off events. [2023-11-06 22:29:34,290 INFO L125 PetriNetUnfolderBase]: For 657/665 co-relation queries the response was YES. [2023-11-06 22:29:34,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 211 events. 118/211 cut-off events. For 657/665 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 673 event pairs, 10 based on Foata normal form. 12/209 useless extension candidates. Maximal degree in co-relation 900. Up to 166 conditions per place. [2023-11-06 22:29:34,293 INFO L140 encePairwiseOnDemand]: 301/309 looper letters, 34 selfloop transitions, 17 changer transitions 0/54 dead transitions. [2023-11-06 22:29:34,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 54 transitions, 405 flow [2023-11-06 22:29:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:29:34,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:29:34,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 700 transitions. [2023-11-06 22:29:34,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3775620280474649 [2023-11-06 22:29:34,297 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 700 transitions. [2023-11-06 22:29:34,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 700 transitions. [2023-11-06 22:29:34,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:34,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 700 transitions. [2023-11-06 22:29:34,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 116.66666666666667) internal successors, (700), 6 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 22:29:34,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 309.0) internal successors, (2163), 7 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states 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 22:29:34,306 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 309.0) internal successors, (2163), 7 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states 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 22:29:34,306 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 234 flow. Second operand 6 states and 700 transitions. [2023-11-06 22:29:34,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 54 transitions, 405 flow [2023-11-06 22:29:34,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 376 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-11-06 22:29:34,311 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 295 flow [2023-11-06 22:29:34,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-11-06 22:29:34,312 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 22 predicate places. [2023-11-06 22:29:34,312 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 295 flow [2023-11-06 22:29:34,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.33333333333333) internal successors, (674), 6 states have internal predecessors, (674), 0 states have call successors, (0), 0 states 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 22:29:34,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:34,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:34,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:34,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:34,521 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:34,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:34,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1511136768, now seen corresponding path program 1 times [2023-11-06 22:29:34,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:34,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403333969] [2023-11-06 22:29:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:34,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:34,925 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 22:29:34,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:34,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403333969] [2023-11-06 22:29:34,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403333969] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:34,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425744055] [2023-11-06 22:29:34,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:34,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:34,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:34,927 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:34,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:29:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:35,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:29:35,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:35,080 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:29:35,128 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:29:35,191 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:29:35,257 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 22:29:35,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:29:35,519 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:35,519 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-11-06 22:29:35,532 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:35,533 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 140 [2023-11-06 22:29:35,553 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:35,554 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 97 [2023-11-06 22:29:35,568 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:35,569 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2023-11-06 22:29:36,076 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 22:29:36,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425744055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:29:36,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:29:36,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2023-11-06 22:29:36,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466006008] [2023-11-06 22:29:36,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:29:36,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:29:36,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:36,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:29:36,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=185, Unknown=2, NotChecked=0, Total=240 [2023-11-06 22:29:36,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 309 [2023-11-06 22:29:36,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 295 flow. Second operand has 16 states, 16 states have (on average 92.5) internal successors, (1480), 16 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states 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 22:29:36,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:36,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 309 [2023-11-06 22:29:36,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:37,268 INFO L124 PetriNetUnfolderBase]: 138/262 cut-off events. [2023-11-06 22:29:37,269 INFO L125 PetriNetUnfolderBase]: For 1135/1149 co-relation queries the response was YES. [2023-11-06 22:29:37,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1209 conditions, 262 events. 138/262 cut-off events. For 1135/1149 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 981 event pairs, 8 based on Foata normal form. 24/272 useless extension candidates. Maximal degree in co-relation 1186. Up to 167 conditions per place. [2023-11-06 22:29:37,273 INFO L140 encePairwiseOnDemand]: 300/309 looper letters, 53 selfloop transitions, 27 changer transitions 0/83 dead transitions. [2023-11-06 22:29:37,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 691 flow [2023-11-06 22:29:37,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:29:37,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:29:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1434 transitions. [2023-11-06 22:29:37,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3093851132686084 [2023-11-06 22:29:37,283 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1434 transitions. [2023-11-06 22:29:37,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1434 transitions. [2023-11-06 22:29:37,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:37,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1434 transitions. [2023-11-06 22:29:37,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 95.6) internal successors, (1434), 15 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states 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 22:29:37,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 309.0) internal successors, (4944), 16 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 22:29:37,302 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 309.0) internal successors, (4944), 16 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 22:29:37,302 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 295 flow. Second operand 15 states and 1434 transitions. [2023-11-06 22:29:37,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 691 flow [2023-11-06 22:29:37,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 643 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-11-06 22:29:37,313 INFO L231 Difference]: Finished difference. Result has 68 places, 56 transitions, 458 flow [2023-11-06 22:29:37,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=458, PETRI_PLACES=68, PETRI_TRANSITIONS=56} [2023-11-06 22:29:37,314 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 37 predicate places. [2023-11-06 22:29:37,315 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 56 transitions, 458 flow [2023-11-06 22:29:37,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 92.5) internal successors, (1480), 16 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states 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 22:29:37,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:37,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:37,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:37,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:37,524 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:37,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:37,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1717318144, now seen corresponding path program 2 times [2023-11-06 22:29:37,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:37,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885308965] [2023-11-06 22:29:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:37,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:38,012 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 22:29:38,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:38,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885308965] [2023-11-06 22:29:38,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885308965] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:38,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972514283] [2023-11-06 22:29:38,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:29:38,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:38,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:38,014 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:38,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:29:38,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:29:38,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:29:38,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:29:38,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:38,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:38,221 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:29:38,253 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 22:29:38,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:29:38,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972514283] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:29:38,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:29:38,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2023-11-06 22:29:38,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379905737] [2023-11-06 22:29:38,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:38,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:29:38,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:38,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:29:38,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:29:38,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 309 [2023-11-06 22:29:38,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 458 flow. Second operand has 6 states, 6 states have (on average 120.33333333333333) internal successors, (722), 6 states have internal predecessors, (722), 0 states have call successors, (0), 0 states 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 22:29:38,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:38,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 309 [2023-11-06 22:29:38,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:38,560 INFO L124 PetriNetUnfolderBase]: 150/273 cut-off events. [2023-11-06 22:29:38,560 INFO L125 PetriNetUnfolderBase]: For 1634/1655 co-relation queries the response was YES. [2023-11-06 22:29:38,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1386 conditions, 273 events. 150/273 cut-off events. For 1634/1655 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 952 event pairs, 12 based on Foata normal form. 19/274 useless extension candidates. Maximal degree in co-relation 1359. Up to 161 conditions per place. [2023-11-06 22:29:38,565 INFO L140 encePairwiseOnDemand]: 302/309 looper letters, 43 selfloop transitions, 22 changer transitions 0/68 dead transitions. [2023-11-06 22:29:38,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 648 flow [2023-11-06 22:29:38,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:29:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:29:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 624 transitions. [2023-11-06 22:29:38,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40388349514563104 [2023-11-06 22:29:38,569 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 624 transitions. [2023-11-06 22:29:38,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 624 transitions. [2023-11-06 22:29:38,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:38,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 624 transitions. [2023-11-06 22:29:38,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:38,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 309.0) internal successors, (1854), 6 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states 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 22:29:38,576 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 309.0) internal successors, (1854), 6 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states 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 22:29:38,576 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 458 flow. Second operand 5 states and 624 transitions. [2023-11-06 22:29:38,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 648 flow [2023-11-06 22:29:38,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 599 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-11-06 22:29:38,584 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 480 flow [2023-11-06 22:29:38,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2023-11-06 22:29:38,585 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2023-11-06 22:29:38,585 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 480 flow [2023-11-06 22:29:38,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 120.33333333333333) internal successors, (722), 6 states have internal predecessors, (722), 0 states have call successors, (0), 0 states 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 22:29:38,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:38,586 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:38,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:38,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:29:38,792 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:38,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:38,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1794685328, now seen corresponding path program 1 times [2023-11-06 22:29:38,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:38,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629348095] [2023-11-06 22:29:38,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:38,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:29:39,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:39,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629348095] [2023-11-06 22:29:39,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629348095] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:39,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067630157] [2023-11-06 22:29:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:39,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:39,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:39,348 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:39,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:29:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:39,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:29:39,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:39,521 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:29:39,612 INFO L322 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2023-11-06 22:29:39,613 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2023-11-06 22:29:39,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:39,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-06 22:29:39,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:39,840 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-06 22:29:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:29:40,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:29:40,491 INFO L322 Elim1Store]: treesize reduction 16, result has 65.2 percent of original size [2023-11-06 22:29:40,491 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 50 [2023-11-06 22:29:40,510 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:40,510 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 89 [2023-11-06 22:29:40,526 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2023-11-06 22:29:40,544 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2023-11-06 22:29:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:29:40,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067630157] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:29:40,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:29:40,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-11-06 22:29:40,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554946882] [2023-11-06 22:29:40,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:29:40,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:29:40,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:40,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:29:40,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=385, Unknown=1, NotChecked=0, Total=462 [2023-11-06 22:29:43,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:29:43,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 309 [2023-11-06 22:29:43,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 480 flow. Second operand has 22 states, 22 states have (on average 92.36363636363636) internal successors, (2032), 22 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states 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 22:29:43,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:43,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 309 [2023-11-06 22:29:43,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:46,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:29:49,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:29:51,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:29:54,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:29:54,436 INFO L124 PetriNetUnfolderBase]: 432/747 cut-off events. [2023-11-06 22:29:54,436 INFO L125 PetriNetUnfolderBase]: For 5883/5899 co-relation queries the response was YES. [2023-11-06 22:29:54,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4047 conditions, 747 events. 432/747 cut-off events. For 5883/5899 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3322 event pairs, 11 based on Foata normal form. 46/722 useless extension candidates. Maximal degree in co-relation 4018. Up to 249 conditions per place. [2023-11-06 22:29:54,448 INFO L140 encePairwiseOnDemand]: 300/309 looper letters, 99 selfloop transitions, 92 changer transitions 0/194 dead transitions. [2023-11-06 22:29:54,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 194 transitions, 1811 flow [2023-11-06 22:29:54,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:29:54,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:29:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2340 transitions. [2023-11-06 22:29:54,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3155339805825243 [2023-11-06 22:29:54,461 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2340 transitions. [2023-11-06 22:29:54,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2340 transitions. [2023-11-06 22:29:54,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:54,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2340 transitions. [2023-11-06 22:29:54,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 97.5) internal successors, (2340), 24 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states 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 22:29:54,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 309.0) internal successors, (7725), 25 states have internal predecessors, (7725), 0 states have call successors, (0), 0 states 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 22:29:54,488 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 309.0) internal successors, (7725), 25 states have internal predecessors, (7725), 0 states have call successors, (0), 0 states 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 22:29:54,489 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 480 flow. Second operand 24 states and 2340 transitions. [2023-11-06 22:29:54,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 194 transitions, 1811 flow [2023-11-06 22:29:54,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 194 transitions, 1689 flow, removed 39 selfloop flow, removed 4 redundant places. [2023-11-06 22:29:54,511 INFO L231 Difference]: Finished difference. Result has 96 places, 136 transitions, 1455 flow [2023-11-06 22:29:54,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1455, PETRI_PLACES=96, PETRI_TRANSITIONS=136} [2023-11-06 22:29:54,512 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 65 predicate places. [2023-11-06 22:29:54,512 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 136 transitions, 1455 flow [2023-11-06 22:29:54,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 92.36363636363636) internal successors, (2032), 22 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states 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 22:29:54,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:54,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:54,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:54,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:29:54,720 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:54,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:54,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1479919384, now seen corresponding path program 1 times [2023-11-06 22:29:54,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:54,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825090463] [2023-11-06 22:29:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:54,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:29:54,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:54,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825090463] [2023-11-06 22:29:54,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825090463] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:54,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178007886] [2023-11-06 22:29:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:54,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:54,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:54,895 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:54,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:29:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:55,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:29:55,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:55,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:29:55,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178007886] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:29:55,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:29:55,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2023-11-06 22:29:55,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144152015] [2023-11-06 22:29:55,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:55,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:29:55,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:55,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:29:55,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:29:55,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 309 [2023-11-06 22:29:55,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 136 transitions, 1455 flow. Second operand has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states 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 22:29:55,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:55,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 309 [2023-11-06 22:29:55,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:55,381 INFO L124 PetriNetUnfolderBase]: 465/842 cut-off events. [2023-11-06 22:29:55,382 INFO L125 PetriNetUnfolderBase]: For 8332/8351 co-relation queries the response was YES. [2023-11-06 22:29:55,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5017 conditions, 842 events. 465/842 cut-off events. For 8332/8351 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4151 event pairs, 42 based on Foata normal form. 71/819 useless extension candidates. Maximal degree in co-relation 4979. Up to 527 conditions per place. [2023-11-06 22:29:55,396 INFO L140 encePairwiseOnDemand]: 303/309 looper letters, 93 selfloop transitions, 57 changer transitions 17/169 dead transitions. [2023-11-06 22:29:55,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 169 transitions, 2137 flow [2023-11-06 22:29:55,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:29:55,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:29:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 562 transitions. [2023-11-06 22:29:55,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546925566343042 [2023-11-06 22:29:55,399 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 562 transitions. [2023-11-06 22:29:55,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 562 transitions. [2023-11-06 22:29:55,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:55,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 562 transitions. [2023-11-06 22:29:55,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.5) internal successors, (562), 4 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 22:29:55,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 309.0) internal successors, (1545), 5 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states 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 22:29:55,404 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 309.0) internal successors, (1545), 5 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states 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 22:29:55,404 INFO L175 Difference]: Start difference. First operand has 96 places, 136 transitions, 1455 flow. Second operand 4 states and 562 transitions. [2023-11-06 22:29:55,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 169 transitions, 2137 flow [2023-11-06 22:29:55,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 169 transitions, 1674 flow, removed 224 selfloop flow, removed 5 redundant places. [2023-11-06 22:29:55,469 INFO L231 Difference]: Finished difference. Result has 94 places, 141 transitions, 1382 flow [2023-11-06 22:29:55,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1382, PETRI_PLACES=94, PETRI_TRANSITIONS=141} [2023-11-06 22:29:55,470 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 63 predicate places. [2023-11-06 22:29:55,470 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 141 transitions, 1382 flow [2023-11-06 22:29:55,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states 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 22:29:55,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:55,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:55,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:55,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:29:55,678 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:29:55,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:55,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1062968012, now seen corresponding path program 1 times [2023-11-06 22:29:55,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:55,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848243461] [2023-11-06 22:29:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:55,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:29:56,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:56,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848243461] [2023-11-06 22:29:56,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848243461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:56,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070779871] [2023-11-06 22:29:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:56,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:56,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:56,340 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:56,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:29:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:56,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:29:56,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:29:56,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:29:56,825 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:56,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-06 22:29:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:29:57,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070779871] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:29:57,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:29:57,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-06 22:29:57,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748890549] [2023-11-06 22:29:57,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:29:57,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:29:57,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:57,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:29:57,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:29:58,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 309 [2023-11-06 22:29:58,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 141 transitions, 1382 flow. Second operand has 23 states, 23 states have (on average 115.43478260869566) internal successors, (2655), 23 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states 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 22:29:58,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:58,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 309 [2023-11-06 22:29:58,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:00,169 INFO L124 PetriNetUnfolderBase]: 297/601 cut-off events. [2023-11-06 22:30:00,169 INFO L125 PetriNetUnfolderBase]: For 6513/6521 co-relation queries the response was YES. [2023-11-06 22:30:00,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3402 conditions, 601 events. 297/601 cut-off events. For 6513/6521 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3087 event pairs, 17 based on Foata normal form. 85/609 useless extension candidates. Maximal degree in co-relation 3368. Up to 233 conditions per place. [2023-11-06 22:30:00,179 INFO L140 encePairwiseOnDemand]: 300/309 looper letters, 97 selfloop transitions, 62 changer transitions 4/165 dead transitions. [2023-11-06 22:30:00,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 165 transitions, 1758 flow [2023-11-06 22:30:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:30:00,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:30:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2158 transitions. [2023-11-06 22:30:00,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38798993167925205 [2023-11-06 22:30:00,186 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2158 transitions. [2023-11-06 22:30:00,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2158 transitions. [2023-11-06 22:30:00,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:00,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2158 transitions. [2023-11-06 22:30:00,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 119.88888888888889) internal successors, (2158), 18 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states 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 22:30:00,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 309.0) internal successors, (5871), 19 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states 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 22:30:00,206 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 309.0) internal successors, (5871), 19 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states 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 22:30:00,206 INFO L175 Difference]: Start difference. First operand has 94 places, 141 transitions, 1382 flow. Second operand 18 states and 2158 transitions. [2023-11-06 22:30:00,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 165 transitions, 1758 flow [2023-11-06 22:30:00,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 165 transitions, 1528 flow, removed 83 selfloop flow, removed 14 redundant places. [2023-11-06 22:30:00,232 INFO L231 Difference]: Finished difference. Result has 90 places, 117 transitions, 1199 flow [2023-11-06 22:30:00,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1199, PETRI_PLACES=90, PETRI_TRANSITIONS=117} [2023-11-06 22:30:00,233 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 59 predicate places. [2023-11-06 22:30:00,233 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 117 transitions, 1199 flow [2023-11-06 22:30:00,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 115.43478260869566) internal successors, (2655), 23 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states 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 22:30:00,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:00,235 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:00,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:00,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:30:00,441 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:30:00,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:00,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2078138899, now seen corresponding path program 1 times [2023-11-06 22:30:00,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:00,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121933662] [2023-11-06 22:30:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:00,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:01,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:01,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121933662] [2023-11-06 22:30:01,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121933662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:01,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865432950] [2023-11-06 22:30:01,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:01,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:01,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:01,340 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:01,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:30:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:01,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:30:01,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:01,484 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-06 22:30:01,682 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:30:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:01,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:01,828 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:01,829 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 40 [2023-11-06 22:30:01,845 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-11-06 22:30:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:30:01,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865432950] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:01,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:30:01,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6] total 17 [2023-11-06 22:30:01,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679529972] [2023-11-06 22:30:01,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:01,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:30:01,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:01,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:30:01,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=275, Unknown=5, NotChecked=0, Total=342 [2023-11-06 22:30:02,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 309 [2023-11-06 22:30:02,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 117 transitions, 1199 flow. Second operand has 6 states, 6 states have (on average 108.33333333333333) internal successors, (650), 6 states have internal predecessors, (650), 0 states have call successors, (0), 0 states 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 22:30:02,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:02,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 309 [2023-11-06 22:30:02,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:02,214 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_403 (Array Int Int))) (< 0 (+ c_~s~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_403) c_~q~0.base) .cse0)))) (< 0 (+ c_~s~0 2147483649 (select (select |c_#memory_int| c_~q~0.base) .cse0))))) is different from false [2023-11-06 22:30:02,439 INFO L124 PetriNetUnfolderBase]: 355/702 cut-off events. [2023-11-06 22:30:02,440 INFO L125 PetriNetUnfolderBase]: For 3655/3663 co-relation queries the response was YES. [2023-11-06 22:30:02,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3713 conditions, 702 events. 355/702 cut-off events. For 3655/3663 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3619 event pairs, 75 based on Foata normal form. 10/614 useless extension candidates. Maximal degree in co-relation 3687. Up to 543 conditions per place. [2023-11-06 22:30:02,450 INFO L140 encePairwiseOnDemand]: 300/309 looper letters, 107 selfloop transitions, 39 changer transitions 0/148 dead transitions. [2023-11-06 22:30:02,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 148 transitions, 1778 flow [2023-11-06 22:30:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:30:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:30:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 675 transitions. [2023-11-06 22:30:02,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3640776699029126 [2023-11-06 22:30:02,454 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 675 transitions. [2023-11-06 22:30:02,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 675 transitions. [2023-11-06 22:30:02,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:02,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 675 transitions. [2023-11-06 22:30:02,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.5) internal successors, (675), 6 states have internal predecessors, (675), 0 states have call successors, (0), 0 states 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 22:30:02,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 309.0) internal successors, (2163), 7 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states 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 22:30:02,460 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 309.0) internal successors, (2163), 7 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states 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 22:30:02,460 INFO L175 Difference]: Start difference. First operand has 90 places, 117 transitions, 1199 flow. Second operand 6 states and 675 transitions. [2023-11-06 22:30:02,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 148 transitions, 1778 flow [2023-11-06 22:30:02,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 148 transitions, 1668 flow, removed 24 selfloop flow, removed 11 redundant places. [2023-11-06 22:30:02,481 INFO L231 Difference]: Finished difference. Result has 86 places, 130 transitions, 1407 flow [2023-11-06 22:30:02,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1407, PETRI_PLACES=86, PETRI_TRANSITIONS=130} [2023-11-06 22:30:02,482 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2023-11-06 22:30:02,482 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 130 transitions, 1407 flow [2023-11-06 22:30:02,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 108.33333333333333) internal successors, (650), 6 states have internal predecessors, (650), 0 states have call successors, (0), 0 states 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 22:30:02,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:02,483 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:02,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:02,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:02,689 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:30:02,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:02,690 INFO L85 PathProgramCache]: Analyzing trace with hash 16729710, now seen corresponding path program 2 times [2023-11-06 22:30:02,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:02,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982609066] [2023-11-06 22:30:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:02,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:03,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:03,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982609066] [2023-11-06 22:30:03,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982609066] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:03,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818339499] [2023-11-06 22:30:03,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:30:03,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:03,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:03,641 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:03,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:30:03,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:30:03,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:03,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:30:03,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:04,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:30:04,036 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:30:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:04,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:04,138 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_436 (Array Int Int))) (< 0 (+ c_~s~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_436) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) is different from false [2023-11-06 22:30:04,160 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:04,160 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 40 [2023-11-06 22:30:04,165 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-11-06 22:30:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-11-06 22:30:04,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818339499] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:04,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:04,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 18 [2023-11-06 22:30:04,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660940673] [2023-11-06 22:30:04,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:04,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:30:04,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:04,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:30:04,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=286, Unknown=1, NotChecked=34, Total=380 [2023-11-06 22:30:04,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 309 [2023-11-06 22:30:04,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 130 transitions, 1407 flow. Second operand has 20 states, 20 states have (on average 95.55) internal successors, (1911), 20 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states 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 22:30:04,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:04,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 309 [2023-11-06 22:30:04,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:05,166 INFO L124 PetriNetUnfolderBase]: 331/661 cut-off events. [2023-11-06 22:30:05,166 INFO L125 PetriNetUnfolderBase]: For 3631/3639 co-relation queries the response was YES. [2023-11-06 22:30:05,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3741 conditions, 661 events. 331/661 cut-off events. For 3631/3639 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3359 event pairs, 23 based on Foata normal form. 6/588 useless extension candidates. Maximal degree in co-relation 3717. Up to 366 conditions per place. [2023-11-06 22:30:05,175 INFO L140 encePairwiseOnDemand]: 301/309 looper letters, 82 selfloop transitions, 56 changer transitions 4/144 dead transitions. [2023-11-06 22:30:05,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 144 transitions, 1738 flow [2023-11-06 22:30:05,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:30:05,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:30:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1280 transitions. [2023-11-06 22:30:05,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3186457555389594 [2023-11-06 22:30:05,182 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1280 transitions. [2023-11-06 22:30:05,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1280 transitions. [2023-11-06 22:30:05,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:05,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1280 transitions. [2023-11-06 22:30:05,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 98.46153846153847) internal successors, (1280), 13 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states 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 22:30:05,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 309.0) internal successors, (4326), 14 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states 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 22:30:05,195 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 309.0) internal successors, (4326), 14 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states 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 22:30:05,196 INFO L175 Difference]: Start difference. First operand has 86 places, 130 transitions, 1407 flow. Second operand 13 states and 1280 transitions. [2023-11-06 22:30:05,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 144 transitions, 1738 flow [2023-11-06 22:30:05,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 144 transitions, 1699 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-06 22:30:05,213 INFO L231 Difference]: Finished difference. Result has 94 places, 121 transitions, 1412 flow [2023-11-06 22:30:05,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1412, PETRI_PLACES=94, PETRI_TRANSITIONS=121} [2023-11-06 22:30:05,214 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 63 predicate places. [2023-11-06 22:30:05,215 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 121 transitions, 1412 flow [2023-11-06 22:30:05,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 95.55) internal successors, (1911), 20 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states 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 22:30:05,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:05,215 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:05,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:05,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:05,421 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:30:05,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:05,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1762884873, now seen corresponding path program 2 times [2023-11-06 22:30:05,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:05,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227341160] [2023-11-06 22:30:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:05,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:06,633 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 22:30:06,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:06,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227341160] [2023-11-06 22:30:06,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227341160] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:06,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534898477] [2023-11-06 22:30:06,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:30:06,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:06,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:06,636 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:06,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:30:06,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:30:06,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:06,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:30:06,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:06,770 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:06,770 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2023-11-06 22:30:06,948 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:30:07,002 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 22:30:07,002 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:07,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534898477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:07,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:30:07,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2023-11-06 22:30:07,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143190134] [2023-11-06 22:30:07,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:07,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:30:07,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:07,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:30:07,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:30:07,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 309 [2023-11-06 22:30:07,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 121 transitions, 1412 flow. Second operand has 6 states, 6 states have (on average 120.33333333333333) internal successors, (722), 6 states have internal predecessors, (722), 0 states have call successors, (0), 0 states 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 22:30:07,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:07,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 309 [2023-11-06 22:30:07,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:07,430 INFO L124 PetriNetUnfolderBase]: 328/654 cut-off events. [2023-11-06 22:30:07,430 INFO L125 PetriNetUnfolderBase]: For 4020/4028 co-relation queries the response was YES. [2023-11-06 22:30:07,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3792 conditions, 654 events. 328/654 cut-off events. For 4020/4028 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3297 event pairs, 62 based on Foata normal form. 10/585 useless extension candidates. Maximal degree in co-relation 3767. Up to 600 conditions per place. [2023-11-06 22:30:07,440 INFO L140 encePairwiseOnDemand]: 304/309 looper letters, 109 selfloop transitions, 9 changer transitions 6/126 dead transitions. [2023-11-06 22:30:07,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 126 transitions, 1677 flow [2023-11-06 22:30:07,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:30:07,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:30:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 620 transitions. [2023-11-06 22:30:07,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40129449838187703 [2023-11-06 22:30:07,443 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 620 transitions. [2023-11-06 22:30:07,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 620 transitions. [2023-11-06 22:30:07,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:07,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 620 transitions. [2023-11-06 22:30:07,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states 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 22:30:07,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 309.0) internal successors, (1854), 6 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states 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 22:30:07,448 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 309.0) internal successors, (1854), 6 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states 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 22:30:07,448 INFO L175 Difference]: Start difference. First operand has 94 places, 121 transitions, 1412 flow. Second operand 5 states and 620 transitions. [2023-11-06 22:30:07,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 126 transitions, 1677 flow [2023-11-06 22:30:07,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 126 transitions, 1576 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-11-06 22:30:07,469 INFO L231 Difference]: Finished difference. Result has 89 places, 118 transitions, 1296 flow [2023-11-06 22:30:07,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=1303, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1296, PETRI_PLACES=89, PETRI_TRANSITIONS=118} [2023-11-06 22:30:07,470 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 58 predicate places. [2023-11-06 22:30:07,470 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 118 transitions, 1296 flow [2023-11-06 22:30:07,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 120.33333333333333) internal successors, (722), 6 states have internal predecessors, (722), 0 states have call successors, (0), 0 states 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 22:30:07,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:07,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:07,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:07,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 22:30:07,683 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:30:07,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:07,683 INFO L85 PathProgramCache]: Analyzing trace with hash 203137224, now seen corresponding path program 2 times [2023-11-06 22:30:07,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:07,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732874064] [2023-11-06 22:30:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:07,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:08,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:08,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732874064] [2023-11-06 22:30:08,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732874064] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:08,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009844824] [2023-11-06 22:30:08,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:30:08,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:08,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:08,254 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:08,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:30:08,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:30:08,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:08,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:30:08,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:08,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:08,564 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-06 22:30:08,564 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-06 22:30:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:30:08,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009844824] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:08,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:08,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 14 [2023-11-06 22:30:08,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280428563] [2023-11-06 22:30:08,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:08,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:30:08,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:08,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:30:08,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:30:09,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 309 [2023-11-06 22:30:09,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 118 transitions, 1296 flow. Second operand has 16 states, 16 states have (on average 117.625) internal successors, (1882), 16 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states 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 22:30:09,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:09,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 309 [2023-11-06 22:30:09,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:09,949 INFO L124 PetriNetUnfolderBase]: 372/739 cut-off events. [2023-11-06 22:30:09,949 INFO L125 PetriNetUnfolderBase]: For 3845/3853 co-relation queries the response was YES. [2023-11-06 22:30:09,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4055 conditions, 739 events. 372/739 cut-off events. For 3845/3853 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3850 event pairs, 50 based on Foata normal form. 20/670 useless extension candidates. Maximal degree in co-relation 4031. Up to 281 conditions per place. [2023-11-06 22:30:09,967 INFO L140 encePairwiseOnDemand]: 300/309 looper letters, 87 selfloop transitions, 93 changer transitions 0/182 dead transitions. [2023-11-06 22:30:09,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 182 transitions, 2064 flow [2023-11-06 22:30:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:30:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:30:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1826 transitions. [2023-11-06 22:30:09,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939590075512406 [2023-11-06 22:30:09,973 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1826 transitions. [2023-11-06 22:30:09,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1826 transitions. [2023-11-06 22:30:09,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:09,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1826 transitions. [2023-11-06 22:30:09,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 121.73333333333333) internal successors, (1826), 15 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states 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 22:30:09,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 309.0) internal successors, (4944), 16 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 22:30:09,986 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 309.0) internal successors, (4944), 16 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 22:30:09,986 INFO L175 Difference]: Start difference. First operand has 89 places, 118 transitions, 1296 flow. Second operand 15 states and 1826 transitions. [2023-11-06 22:30:09,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 182 transitions, 2064 flow [2023-11-06 22:30:10,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 182 transitions, 2028 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-11-06 22:30:10,007 INFO L231 Difference]: Finished difference. Result has 98 places, 138 transitions, 1695 flow [2023-11-06 22:30:10,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1695, PETRI_PLACES=98, PETRI_TRANSITIONS=138} [2023-11-06 22:30:10,008 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 67 predicate places. [2023-11-06 22:30:10,008 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 138 transitions, 1695 flow [2023-11-06 22:30:10,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 117.625) internal successors, (1882), 16 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states 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 22:30:10,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:10,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:10,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:10,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:30:10,216 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:30:10,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:10,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1014463629, now seen corresponding path program 1 times [2023-11-06 22:30:10,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:10,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921675374] [2023-11-06 22:30:10,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:10,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:10,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:10,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921675374] [2023-11-06 22:30:10,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921675374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:10,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701754834] [2023-11-06 22:30:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:10,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:10,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:10,868 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:10,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:30:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:10,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:30:11,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:11,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:30:11,217 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-11-06 22:30:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:11,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:13,583 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:13,584 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 79 [2023-11-06 22:30:13,597 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:13,597 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 6 [2023-11-06 22:30:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:30:13,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701754834] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:13,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:13,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 21 [2023-11-06 22:30:13,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329951] [2023-11-06 22:30:13,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:13,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:30:13,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:13,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:30:13,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=438, Unknown=5, NotChecked=0, Total=506 [2023-11-06 22:30:15,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:30:18,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:30:20,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:30:22,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:30:24,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:30:27,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:30:29,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:30:29,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 309 [2023-11-06 22:30:29,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 138 transitions, 1695 flow. Second operand has 23 states, 23 states have (on average 95.3913043478261) internal successors, (2194), 23 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states 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 22:30:29,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:29,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 309 [2023-11-06 22:30:29,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:30,135 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~q_front~0 4))) (let ((.cse1 (select |c_#memory_int| c_~q~0.base)) (.cse4 (+ .cse5 c_~q~0.offset))) (let ((.cse0 (select .cse1 .cse4)) (.cse2 (+ .cse5 c_~q~0.offset 4))) (and (< (+ c_~s~0 .cse0) 2147483648) (< (+ c_~s~0 .cse0 (select .cse1 .cse2)) 2147483648) (forall ((v_ArrVal_532 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_532) c_~q~0.base))) (+ c_~s~0 (select .cse3 .cse4) (select .cse3 .cse2))) 2147483648)))))) is different from false [2023-11-06 22:30:32,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:30:36,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:30:38,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:30:40,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:30:40,993 INFO L124 PetriNetUnfolderBase]: 508/1004 cut-off events. [2023-11-06 22:30:40,993 INFO L125 PetriNetUnfolderBase]: For 7258/7266 co-relation queries the response was YES. [2023-11-06 22:30:40,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5879 conditions, 1004 events. 508/1004 cut-off events. For 7258/7266 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5589 event pairs, 28 based on Foata normal form. 50/934 useless extension candidates. Maximal degree in co-relation 5854. Up to 472 conditions per place. [2023-11-06 22:30:41,003 INFO L140 encePairwiseOnDemand]: 298/309 looper letters, 122 selfloop transitions, 92 changer transitions 25/241 dead transitions. [2023-11-06 22:30:41,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 241 transitions, 3046 flow [2023-11-06 22:30:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:30:41,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:30:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2079 transitions. [2023-11-06 22:30:41,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32038834951456313 [2023-11-06 22:30:41,011 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2079 transitions. [2023-11-06 22:30:41,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2079 transitions. [2023-11-06 22:30:41,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:41,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2079 transitions. [2023-11-06 22:30:41,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 99.0) internal successors, (2079), 21 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states 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 22:30:41,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 309.0) internal successors, (6798), 22 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states 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 22:30:41,019 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 309.0) internal successors, (6798), 22 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states 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 22:30:41,019 INFO L175 Difference]: Start difference. First operand has 98 places, 138 transitions, 1695 flow. Second operand 21 states and 2079 transitions. [2023-11-06 22:30:41,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 241 transitions, 3046 flow [2023-11-06 22:30:41,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 241 transitions, 2883 flow, removed 29 selfloop flow, removed 7 redundant places. [2023-11-06 22:30:41,051 INFO L231 Difference]: Finished difference. Result has 117 places, 165 transitions, 2185 flow [2023-11-06 22:30:41,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2185, PETRI_PLACES=117, PETRI_TRANSITIONS=165} [2023-11-06 22:30:41,052 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 86 predicate places. [2023-11-06 22:30:41,052 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 165 transitions, 2185 flow [2023-11-06 22:30:41,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 95.3913043478261) internal successors, (2194), 23 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states 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 22:30:41,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:41,054 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:41,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:41,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:30:41,260 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:30:41,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:41,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1014463584, now seen corresponding path program 3 times [2023-11-06 22:30:41,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:41,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304084155] [2023-11-06 22:30:41,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:41,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:41,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:41,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304084155] [2023-11-06 22:30:41,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304084155] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:41,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229056761] [2023-11-06 22:30:41,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:30:41,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:41,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:41,940 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:41,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:30:42,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:30:42,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:42,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:30:42,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:42,208 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:30:42,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:30:42,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:30:42,472 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:30:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:42,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:43,329 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:43,330 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2023-11-06 22:30:43,345 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:43,345 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 105 [2023-11-06 22:30:43,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2023-11-06 22:30:43,373 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:43,374 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 49 [2023-11-06 22:30:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:43,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229056761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:43,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:43,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-11-06 22:30:43,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254475608] [2023-11-06 22:30:43,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:43,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:30:43,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:43,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:30:43,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:30:46,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 309 [2023-11-06 22:30:46,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 165 transitions, 2185 flow. Second operand has 26 states, 26 states have (on average 106.26923076923077) internal successors, (2763), 26 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states 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 22:30:46,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:46,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 309 [2023-11-06 22:30:46,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:47,277 INFO L124 PetriNetUnfolderBase]: 443/882 cut-off events. [2023-11-06 22:30:47,277 INFO L125 PetriNetUnfolderBase]: For 8076/8084 co-relation queries the response was YES. [2023-11-06 22:30:47,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5782 conditions, 882 events. 443/882 cut-off events. For 8076/8084 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4770 event pairs, 96 based on Foata normal form. 10/783 useless extension candidates. Maximal degree in co-relation 5750. Up to 748 conditions per place. [2023-11-06 22:30:47,289 INFO L140 encePairwiseOnDemand]: 301/309 looper letters, 151 selfloop transitions, 23 changer transitions 10/186 dead transitions. [2023-11-06 22:30:47,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 186 transitions, 2705 flow [2023-11-06 22:30:47,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:30:47,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:30:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1310 transitions. [2023-11-06 22:30:47,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35329018338727075 [2023-11-06 22:30:47,291 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1310 transitions. [2023-11-06 22:30:47,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1310 transitions. [2023-11-06 22:30:47,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:47,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1310 transitions. [2023-11-06 22:30:47,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 109.16666666666667) internal successors, (1310), 12 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states 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 22:30:47,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 309.0) internal successors, (4017), 13 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states 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 22:30:47,297 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 309.0) internal successors, (4017), 13 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states 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 22:30:47,297 INFO L175 Difference]: Start difference. First operand has 117 places, 165 transitions, 2185 flow. Second operand 12 states and 1310 transitions. [2023-11-06 22:30:47,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 186 transitions, 2705 flow [2023-11-06 22:30:47,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 186 transitions, 2548 flow, removed 57 selfloop flow, removed 9 redundant places. [2023-11-06 22:30:47,334 INFO L231 Difference]: Finished difference. Result has 114 places, 160 transitions, 2022 flow [2023-11-06 22:30:47,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2022, PETRI_PLACES=114, PETRI_TRANSITIONS=160} [2023-11-06 22:30:47,335 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 83 predicate places. [2023-11-06 22:30:47,336 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 160 transitions, 2022 flow [2023-11-06 22:30:47,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 106.26923076923077) internal successors, (2763), 26 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states 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 22:30:47,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:47,337 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:47,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:47,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:30:47,547 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:30:47,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:47,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1762072243, now seen corresponding path program 2 times [2023-11-06 22:30:47,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:47,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722976705] [2023-11-06 22:30:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:47,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:30:47,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:47,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722976705] [2023-11-06 22:30:47,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722976705] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:47,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144938288] [2023-11-06 22:30:47,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:30:47,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:47,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:47,654 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:47,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:30:47,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:30:47,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:47,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:30:47,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:30:47,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:30:47,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144938288] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:47,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:47,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 5] total 9 [2023-11-06 22:30:47,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533967865] [2023-11-06 22:30:47,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:47,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:30:47,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:30:47,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:30:47,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 309 [2023-11-06 22:30:47,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 160 transitions, 2022 flow. Second operand has 11 states, 11 states have (on average 134.63636363636363) internal successors, (1481), 11 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states 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 22:30:47,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:47,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 309 [2023-11-06 22:30:47,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:48,232 INFO L124 PetriNetUnfolderBase]: 582/1090 cut-off events. [2023-11-06 22:30:48,232 INFO L125 PetriNetUnfolderBase]: For 9596/9604 co-relation queries the response was YES. [2023-11-06 22:30:48,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7013 conditions, 1090 events. 582/1090 cut-off events. For 9596/9604 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5798 event pairs, 35 based on Foata normal form. 28/983 useless extension candidates. Maximal degree in co-relation 6981. Up to 597 conditions per place. [2023-11-06 22:30:48,242 INFO L140 encePairwiseOnDemand]: 303/309 looper letters, 88 selfloop transitions, 108 changer transitions 10/208 dead transitions. [2023-11-06 22:30:48,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 208 transitions, 2997 flow [2023-11-06 22:30:48,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:30:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:30:48,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 704 transitions. [2023-11-06 22:30:48,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455663430420712 [2023-11-06 22:30:48,245 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 704 transitions. [2023-11-06 22:30:48,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 704 transitions. [2023-11-06 22:30:48,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:48,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 704 transitions. [2023-11-06 22:30:48,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.8) internal successors, (704), 5 states have internal predecessors, (704), 0 states have call successors, (0), 0 states 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 22:30:48,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 309.0) internal successors, (1854), 6 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states 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 22:30:48,248 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 309.0) internal successors, (1854), 6 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states 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 22:30:48,248 INFO L175 Difference]: Start difference. First operand has 114 places, 160 transitions, 2022 flow. Second operand 5 states and 704 transitions. [2023-11-06 22:30:48,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 208 transitions, 2997 flow [2023-11-06 22:30:48,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 208 transitions, 2923 flow, removed 12 selfloop flow, removed 10 redundant places. [2023-11-06 22:30:48,275 INFO L231 Difference]: Finished difference. Result has 103 places, 186 transitions, 2653 flow [2023-11-06 22:30:48,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=1931, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2653, PETRI_PLACES=103, PETRI_TRANSITIONS=186} [2023-11-06 22:30:48,275 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 72 predicate places. [2023-11-06 22:30:48,276 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 186 transitions, 2653 flow [2023-11-06 22:30:48,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 134.63636363636363) internal successors, (1481), 11 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states 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 22:30:48,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:48,276 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:48,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:48,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:48,477 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:30:48,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:48,477 INFO L85 PathProgramCache]: Analyzing trace with hash 175073182, now seen corresponding path program 4 times [2023-11-06 22:30:48,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:48,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145051596] [2023-11-06 22:30:48,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:48,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:49,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:49,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145051596] [2023-11-06 22:30:49,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145051596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:49,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580867202] [2023-11-06 22:30:49,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:30:49,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:49,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:49,522 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:49,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:30:49,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:30:49,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:49,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:30:49,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:49,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:30:49,933 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-11-06 22:30:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:50,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:50,181 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* c_~q_front~0 4))) (let ((.cse3 (+ .cse6 c_~q~0.offset 4)) (.cse2 (+ .cse6 c_~q~0.offset))) (and (forall ((v_ArrVal_628 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_628) c_~q~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (< 0 (+ c_~s~0 2147483650 .cse0)) (< 0 (+ c_~s~0 2147483649 .cse0 (select .cse1 .cse2))))))) (forall ((v_ArrVal_628 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_628) c_~q~0.base))) (let ((.cse4 (select .cse5 .cse2))) (or (< 0 (+ .cse4 1)) (< 0 (+ c_~s~0 2147483649 (select .cse5 .cse3) .cse4))))))))) is different from false [2023-11-06 22:30:50,321 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:50,321 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 205 treesize of output 173 [2023-11-06 22:30:50,339 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:50,339 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 105 [2023-11-06 22:30:50,349 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:50,350 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 85 [2023-11-06 22:30:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:30:50,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580867202] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:50,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:50,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 23 [2023-11-06 22:30:50,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699779548] [2023-11-06 22:30:50,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:50,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:30:50,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:50,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:30:50,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=485, Unknown=1, NotChecked=44, Total=600 [2023-11-06 22:30:50,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 309 [2023-11-06 22:30:50,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 186 transitions, 2653 flow. Second operand has 25 states, 25 states have (on average 95.36) internal successors, (2384), 25 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states 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 22:30:50,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:50,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 309 [2023-11-06 22:30:50,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:53,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:30:54,411 INFO L124 PetriNetUnfolderBase]: 618/1204 cut-off events. [2023-11-06 22:30:54,411 INFO L125 PetriNetUnfolderBase]: For 12304/12312 co-relation queries the response was YES. [2023-11-06 22:30:54,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8300 conditions, 1204 events. 618/1204 cut-off events. For 12304/12312 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6829 event pairs, 43 based on Foata normal form. 18/1087 useless extension candidates. Maximal degree in co-relation 8269. Up to 605 conditions per place. [2023-11-06 22:30:54,422 INFO L140 encePairwiseOnDemand]: 297/309 looper letters, 102 selfloop transitions, 159 changer transitions 15/278 dead transitions. [2023-11-06 22:30:54,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 278 transitions, 4221 flow [2023-11-06 22:30:54,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:30:54,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:30:54,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2080 transitions. [2023-11-06 22:30:54,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3205424564647866 [2023-11-06 22:30:54,427 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2080 transitions. [2023-11-06 22:30:54,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2080 transitions. [2023-11-06 22:30:54,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:54,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2080 transitions. [2023-11-06 22:30:54,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 99.04761904761905) internal successors, (2080), 21 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states 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 22:30:54,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 309.0) internal successors, (6798), 22 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states 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 22:30:54,439 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 309.0) internal successors, (6798), 22 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states 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 22:30:54,439 INFO L175 Difference]: Start difference. First operand has 103 places, 186 transitions, 2653 flow. Second operand 21 states and 2080 transitions. [2023-11-06 22:30:54,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 278 transitions, 4221 flow [2023-11-06 22:30:54,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 278 transitions, 4067 flow, removed 65 selfloop flow, removed 1 redundant places. [2023-11-06 22:30:54,493 INFO L231 Difference]: Finished difference. Result has 125 places, 219 transitions, 3622 flow [2023-11-06 22:30:54,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3622, PETRI_PLACES=125, PETRI_TRANSITIONS=219} [2023-11-06 22:30:54,494 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 94 predicate places. [2023-11-06 22:30:54,495 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 219 transitions, 3622 flow [2023-11-06 22:30:54,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 95.36) internal successors, (2384), 25 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states 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 22:30:54,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:54,495 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:54,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:54,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:54,701 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:30:54,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:54,701 INFO L85 PathProgramCache]: Analyzing trace with hash -515684134, now seen corresponding path program 3 times [2023-11-06 22:30:54,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:54,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286633753] [2023-11-06 22:30:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:54,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:55,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:55,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286633753] [2023-11-06 22:30:55,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286633753] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:55,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279330505] [2023-11-06 22:30:55,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:30:55,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:55,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:55,666 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:55,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:30:55,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:30:55,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:55,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:30:55,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:56,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:30:56,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-11-06 22:30:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:30:56,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:58,466 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:58,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 79 [2023-11-06 22:30:58,474 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:58,474 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 6 [2023-11-06 22:30:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:30:58,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279330505] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:58,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:58,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 22 [2023-11-06 22:30:58,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740049294] [2023-11-06 22:30:58,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:58,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:30:58,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:58,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:30:58,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=482, Unknown=3, NotChecked=0, Total=552 [2023-11-06 22:31:00,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:31:02,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:31:05,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:31:07,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:31:09,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:31:11,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:31:13,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:31:15,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:31:18,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:31:20,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:31:22,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:31:24,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:31:24,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 309 [2023-11-06 22:31:24,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 219 transitions, 3622 flow. Second operand has 24 states, 24 states have (on average 95.45833333333333) internal successors, (2291), 24 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states 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 22:31:24,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:24,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 309 [2023-11-06 22:31:24,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:27,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:31:29,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:31:30,498 INFO L124 PetriNetUnfolderBase]: 872/1600 cut-off events. [2023-11-06 22:31:30,498 INFO L125 PetriNetUnfolderBase]: For 17152/17160 co-relation queries the response was YES. [2023-11-06 22:31:30,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11631 conditions, 1600 events. 872/1600 cut-off events. For 17152/17160 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 8999 event pairs, 27 based on Foata normal form. 81/1500 useless extension candidates. Maximal degree in co-relation 11596. Up to 873 conditions per place. [2023-11-06 22:31:30,517 INFO L140 encePairwiseOnDemand]: 301/309 looper letters, 171 selfloop transitions, 180 changer transitions 11/364 dead transitions. [2023-11-06 22:31:30,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 364 transitions, 5887 flow [2023-11-06 22:31:30,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:31:30,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 22:31:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2477 transitions. [2023-11-06 22:31:30,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3206472491909385 [2023-11-06 22:31:30,522 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2477 transitions. [2023-11-06 22:31:30,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2477 transitions. [2023-11-06 22:31:30,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:30,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2477 transitions. [2023-11-06 22:31:30,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 99.08) internal successors, (2477), 25 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states 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 22:31:30,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 309.0) internal successors, (8034), 26 states have internal predecessors, (8034), 0 states have call successors, (0), 0 states 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 22:31:30,535 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 309.0) internal successors, (8034), 26 states have internal predecessors, (8034), 0 states have call successors, (0), 0 states 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 22:31:30,536 INFO L175 Difference]: Start difference. First operand has 125 places, 219 transitions, 3622 flow. Second operand 25 states and 2477 transitions. [2023-11-06 22:31:30,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 364 transitions, 5887 flow [2023-11-06 22:31:30,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 364 transitions, 5534 flow, removed 62 selfloop flow, removed 15 redundant places. [2023-11-06 22:31:30,613 INFO L231 Difference]: Finished difference. Result has 136 places, 263 transitions, 4450 flow [2023-11-06 22:31:30,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4450, PETRI_PLACES=136, PETRI_TRANSITIONS=263} [2023-11-06 22:31:30,614 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 105 predicate places. [2023-11-06 22:31:30,614 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 263 transitions, 4450 flow [2023-11-06 22:31:30,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 95.45833333333333) internal successors, (2291), 24 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states 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 22:31:30,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:30,615 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:30,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:30,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:31:30,819 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:31:30,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:30,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1098396139, now seen corresponding path program 1 times [2023-11-06 22:31:30,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:30,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164458795] [2023-11-06 22:31:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:30,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:31,514 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 22:31:31,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:31,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164458795] [2023-11-06 22:31:31,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164458795] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:31,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603358755] [2023-11-06 22:31:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:31,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:31,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:31,520 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:31,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:31:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:31,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:31:31,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:31,672 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-11-06 22:31:32,008 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:31:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:32,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:32,510 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:32,510 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2023-11-06 22:31:32,515 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-11-06 22:31:33,177 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 22:31:33,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603358755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:33,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:33,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-06 22:31:33,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562545599] [2023-11-06 22:31:33,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:33,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:31:33,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:33,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:31:33,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=824, Unknown=1, NotChecked=0, Total=992 [2023-11-06 22:31:34,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 309 [2023-11-06 22:31:34,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 263 transitions, 4450 flow. Second operand has 32 states, 32 states have (on average 95.21875) internal successors, (3047), 32 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states 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 22:31:34,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:34,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 309 [2023-11-06 22:31:34,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:38,049 INFO L124 PetriNetUnfolderBase]: 1379/2503 cut-off events. [2023-11-06 22:31:38,049 INFO L125 PetriNetUnfolderBase]: For 36709/36716 co-relation queries the response was YES. [2023-11-06 22:31:38,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20335 conditions, 2503 events. 1379/2503 cut-off events. For 36709/36716 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15012 event pairs, 127 based on Foata normal form. 107/2506 useless extension candidates. Maximal degree in co-relation 20295. Up to 1391 conditions per place. [2023-11-06 22:31:38,079 INFO L140 encePairwiseOnDemand]: 301/309 looper letters, 251 selfloop transitions, 285 changer transitions 1/539 dead transitions. [2023-11-06 22:31:38,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 539 transitions, 9430 flow [2023-11-06 22:31:38,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 22:31:38,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-06 22:31:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4005 transitions. [2023-11-06 22:31:38,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32402912621359226 [2023-11-06 22:31:38,087 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4005 transitions. [2023-11-06 22:31:38,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4005 transitions. [2023-11-06 22:31:38,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:38,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4005 transitions. [2023-11-06 22:31:38,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 100.125) internal successors, (4005), 40 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states 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 22:31:38,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 309.0) internal successors, (12669), 41 states have internal predecessors, (12669), 0 states have call successors, (0), 0 states 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 22:31:38,108 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 309.0) internal successors, (12669), 41 states have internal predecessors, (12669), 0 states have call successors, (0), 0 states 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 22:31:38,108 INFO L175 Difference]: Start difference. First operand has 136 places, 263 transitions, 4450 flow. Second operand 40 states and 4005 transitions. [2023-11-06 22:31:38,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 539 transitions, 9430 flow [2023-11-06 22:31:38,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 539 transitions, 9091 flow, removed 95 selfloop flow, removed 16 redundant places. [2023-11-06 22:31:38,274 INFO L231 Difference]: Finished difference. Result has 157 places, 445 transitions, 8406 flow [2023-11-06 22:31:38,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=4066, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=8406, PETRI_PLACES=157, PETRI_TRANSITIONS=445} [2023-11-06 22:31:38,281 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 126 predicate places. [2023-11-06 22:31:38,281 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 445 transitions, 8406 flow [2023-11-06 22:31:38,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 95.21875) internal successors, (3047), 32 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states 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 22:31:38,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:38,282 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:38,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:38,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:31:38,488 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:31:38,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:38,488 INFO L85 PathProgramCache]: Analyzing trace with hash 518622994, now seen corresponding path program 2 times [2023-11-06 22:31:38,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:38,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330924547] [2023-11-06 22:31:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:38,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:39,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:39,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330924547] [2023-11-06 22:31:39,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330924547] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:39,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341325485] [2023-11-06 22:31:39,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:31:39,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:39,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:39,505 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:39,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:31:39,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:31:39,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:39,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:31:39,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:39,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:31:39,899 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-11-06 22:31:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:40,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:40,247 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:40,247 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 81 [2023-11-06 22:31:40,302 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:40,302 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2023-11-06 22:31:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:31:40,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341325485] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:40,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:40,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 23 [2023-11-06 22:31:40,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121435062] [2023-11-06 22:31:40,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:40,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:31:40,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:40,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:31:40,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=523, Unknown=5, NotChecked=0, Total=600 [2023-11-06 22:31:42,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:31:43,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 309 [2023-11-06 22:31:43,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 445 transitions, 8406 flow. Second operand has 25 states, 25 states have (on average 95.36) internal successors, (2384), 25 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states 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 22:31:43,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:43,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 309 [2023-11-06 22:31:43,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:45,018 INFO L124 PetriNetUnfolderBase]: 1381/2559 cut-off events. [2023-11-06 22:31:45,019 INFO L125 PetriNetUnfolderBase]: For 37596/37603 co-relation queries the response was YES. [2023-11-06 22:31:45,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22182 conditions, 2559 events. 1381/2559 cut-off events. For 37596/37603 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15805 event pairs, 62 based on Foata normal form. 33/2516 useless extension candidates. Maximal degree in co-relation 22135. Up to 1414 conditions per place. [2023-11-06 22:31:45,040 INFO L140 encePairwiseOnDemand]: 301/309 looper letters, 295 selfloop transitions, 211 changer transitions 0/508 dead transitions. [2023-11-06 22:31:45,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 508 transitions, 10152 flow [2023-11-06 22:31:45,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:31:45,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:31:45,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1776 transitions. [2023-11-06 22:31:45,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3193096008629989 [2023-11-06 22:31:45,044 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1776 transitions. [2023-11-06 22:31:45,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1776 transitions. [2023-11-06 22:31:45,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:45,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1776 transitions. [2023-11-06 22:31:45,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 98.66666666666667) internal successors, (1776), 18 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states 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 22:31:45,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 309.0) internal successors, (5871), 19 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states 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 22:31:45,051 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 309.0) internal successors, (5871), 19 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states 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 22:31:45,051 INFO L175 Difference]: Start difference. First operand has 157 places, 445 transitions, 8406 flow. Second operand 18 states and 1776 transitions. [2023-11-06 22:31:45,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 508 transitions, 10152 flow [2023-11-06 22:31:45,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 508 transitions, 7883 flow, removed 1126 selfloop flow, removed 6 redundant places. [2023-11-06 22:31:45,292 INFO L231 Difference]: Finished difference. Result has 169 places, 441 transitions, 6783 flow [2023-11-06 22:31:45,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=6266, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6783, PETRI_PLACES=169, PETRI_TRANSITIONS=441} [2023-11-06 22:31:45,293 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 138 predicate places. [2023-11-06 22:31:45,293 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 441 transitions, 6783 flow [2023-11-06 22:31:45,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 95.36) internal successors, (2384), 25 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states 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 22:31:45,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:45,294 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:45,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:45,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:31:45,496 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:31:45,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:45,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1210339531, now seen corresponding path program 5 times [2023-11-06 22:31:45,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:45,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488242870] [2023-11-06 22:31:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:45,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:46,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:46,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488242870] [2023-11-06 22:31:46,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488242870] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:46,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60397387] [2023-11-06 22:31:46,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:31:46,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:46,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:46,148 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:46,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:31:46,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:31:46,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:46,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 22:31:46,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:46,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:47,363 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:47,363 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 148 treesize of output 128 [2023-11-06 22:31:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:47,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60397387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:47,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:47,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-06 22:31:47,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995545484] [2023-11-06 22:31:47,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:47,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:31:47,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:47,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:31:47,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:31:51,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 309 [2023-11-06 22:31:51,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 441 transitions, 6783 flow. Second operand has 32 states, 32 states have (on average 115.3125) internal successors, (3690), 32 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states 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 22:31:51,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:51,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 309 [2023-11-06 22:31:51,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:56,314 INFO L124 PetriNetUnfolderBase]: 1514/2865 cut-off events. [2023-11-06 22:31:56,314 INFO L125 PetriNetUnfolderBase]: For 31053/31060 co-relation queries the response was YES. [2023-11-06 22:31:56,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20881 conditions, 2865 events. 1514/2865 cut-off events. For 31053/31060 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18891 event pairs, 113 based on Foata normal form. 191/2936 useless extension candidates. Maximal degree in co-relation 20833. Up to 1703 conditions per place. [2023-11-06 22:31:56,336 INFO L140 encePairwiseOnDemand]: 300/309 looper letters, 374 selfloop transitions, 276 changer transitions 7/659 dead transitions. [2023-11-06 22:31:56,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 659 transitions, 10661 flow [2023-11-06 22:31:56,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-06 22:31:56,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-06 22:31:56,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 5857 transitions. [2023-11-06 22:31:56,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3868304603394756 [2023-11-06 22:31:56,345 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 5857 transitions. [2023-11-06 22:31:56,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 5857 transitions. [2023-11-06 22:31:56,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:56,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 5857 transitions. [2023-11-06 22:31:56,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 119.53061224489795) internal successors, (5857), 49 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states 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 22:31:56,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 309.0) internal successors, (15450), 50 states have internal predecessors, (15450), 0 states have call successors, (0), 0 states 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 22:31:56,372 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 309.0) internal successors, (15450), 50 states have internal predecessors, (15450), 0 states have call successors, (0), 0 states 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 22:31:56,372 INFO L175 Difference]: Start difference. First operand has 169 places, 441 transitions, 6783 flow. Second operand 49 states and 5857 transitions. [2023-11-06 22:31:56,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 659 transitions, 10661 flow [2023-11-06 22:31:56,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 659 transitions, 10297 flow, removed 28 selfloop flow, removed 15 redundant places. [2023-11-06 22:31:56,493 INFO L231 Difference]: Finished difference. Result has 209 places, 531 transitions, 9131 flow [2023-11-06 22:31:56,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=5723, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=9131, PETRI_PLACES=209, PETRI_TRANSITIONS=531} [2023-11-06 22:31:56,494 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 178 predicate places. [2023-11-06 22:31:56,495 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 531 transitions, 9131 flow [2023-11-06 22:31:56,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 115.3125) internal successors, (3690), 32 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states 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 22:31:56,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:56,495 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:56,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:56,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:56,697 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:31:56,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:56,697 INFO L85 PathProgramCache]: Analyzing trace with hash -774085382, now seen corresponding path program 2 times [2023-11-06 22:31:56,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:56,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421372924] [2023-11-06 22:31:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:56,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:57,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:57,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421372924] [2023-11-06 22:31:57,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421372924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:57,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188877565] [2023-11-06 22:31:57,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:31:57,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:57,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:57,324 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:57,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:31:57,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:31:57,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:57,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:31:57,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:31:57,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:57,695 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-06 22:31:57,695 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 22:31:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 22:31:57,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188877565] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:57,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:57,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 19 [2023-11-06 22:31:57,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354620826] [2023-11-06 22:31:57,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:57,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:31:57,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:57,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:31:57,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:31:58,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 309 [2023-11-06 22:31:58,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 531 transitions, 9131 flow. Second operand has 21 states, 21 states have (on average 117.52380952380952) internal successors, (2468), 21 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states 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 22:31:58,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:58,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 309 [2023-11-06 22:31:58,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:00,483 INFO L124 PetriNetUnfolderBase]: 1582/3071 cut-off events. [2023-11-06 22:32:00,483 INFO L125 PetriNetUnfolderBase]: For 33795/33800 co-relation queries the response was YES. [2023-11-06 22:32:00,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22433 conditions, 3071 events. 1582/3071 cut-off events. For 33795/33800 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20502 event pairs, 75 based on Foata normal form. 167/3096 useless extension candidates. Maximal degree in co-relation 22370. Up to 1148 conditions per place. [2023-11-06 22:32:00,508 INFO L140 encePairwiseOnDemand]: 301/309 looper letters, 199 selfloop transitions, 414 changer transitions 28/643 dead transitions. [2023-11-06 22:32:00,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 643 transitions, 11359 flow [2023-11-06 22:32:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:32:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:32:00,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2570 transitions. [2023-11-06 22:32:00,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39605486207427953 [2023-11-06 22:32:00,513 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2570 transitions. [2023-11-06 22:32:00,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2570 transitions. [2023-11-06 22:32:00,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:00,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2570 transitions. [2023-11-06 22:32:00,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 122.38095238095238) internal successors, (2570), 21 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states 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 22:32:00,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 309.0) internal successors, (6798), 22 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states 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 22:32:00,525 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 309.0) internal successors, (6798), 22 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states 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 22:32:00,525 INFO L175 Difference]: Start difference. First operand has 209 places, 531 transitions, 9131 flow. Second operand 21 states and 2570 transitions. [2023-11-06 22:32:00,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 643 transitions, 11359 flow [2023-11-06 22:32:00,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 643 transitions, 10624 flow, removed 266 selfloop flow, removed 10 redundant places. [2023-11-06 22:32:00,728 INFO L231 Difference]: Finished difference. Result has 226 places, 559 transitions, 10028 flow [2023-11-06 22:32:00,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=8100, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=10028, PETRI_PLACES=226, PETRI_TRANSITIONS=559} [2023-11-06 22:32:00,729 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 195 predicate places. [2023-11-06 22:32:00,729 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 559 transitions, 10028 flow [2023-11-06 22:32:00,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 117.52380952380952) internal successors, (2468), 21 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states 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 22:32:00,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:00,729 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:00,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:00,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:00,932 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:32:00,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:00,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1160783456, now seen corresponding path program 4 times [2023-11-06 22:32:00,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:00,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449508777] [2023-11-06 22:32:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:00,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:02,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:02,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449508777] [2023-11-06 22:32:02,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449508777] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:02,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812716573] [2023-11-06 22:32:02,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:32:02,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:02,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:02,260 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:02,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:32:02,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:32:02,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:02,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 22:32:02,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:02,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:32:02,758 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:32:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:04,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:04,822 INFO L322 Elim1Store]: treesize reduction 50, result has 54.1 percent of original size [2023-11-06 22:32:04,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 146 treesize of output 154 [2023-11-06 22:32:04,899 INFO L322 Elim1Store]: treesize reduction 34, result has 47.7 percent of original size [2023-11-06 22:32:04,900 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 78 [2023-11-06 22:32:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:06,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812716573] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:06,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:06,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-06 22:32:06,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022364414] [2023-11-06 22:32:06,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:06,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:32:06,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:06,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:32:06,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1016, Unknown=1, NotChecked=0, Total=1190 [2023-11-06 22:32:08,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:32:08,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 309 [2023-11-06 22:32:08,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 559 transitions, 10028 flow. Second operand has 35 states, 35 states have (on average 95.2) internal successors, (3332), 35 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states 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 22:32:08,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:08,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 309 [2023-11-06 22:32:08,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:14,626 INFO L124 PetriNetUnfolderBase]: 1617/3283 cut-off events. [2023-11-06 22:32:14,627 INFO L125 PetriNetUnfolderBase]: For 42340/42345 co-relation queries the response was YES. [2023-11-06 22:32:14,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25622 conditions, 3283 events. 1617/3283 cut-off events. For 42340/42345 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 23306 event pairs, 130 based on Foata normal form. 455/3614 useless extension candidates. Maximal degree in co-relation 25553. Up to 1309 conditions per place. [2023-11-06 22:32:14,666 INFO L140 encePairwiseOnDemand]: 301/309 looper letters, 317 selfloop transitions, 401 changer transitions 35/755 dead transitions. [2023-11-06 22:32:14,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 755 transitions, 14296 flow [2023-11-06 22:32:14,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 22:32:14,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 22:32:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2970 transitions. [2023-11-06 22:32:14,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32038834951456313 [2023-11-06 22:32:14,672 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2970 transitions. [2023-11-06 22:32:14,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2970 transitions. [2023-11-06 22:32:14,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:14,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2970 transitions. [2023-11-06 22:32:14,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 99.0) internal successors, (2970), 30 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states 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 22:32:14,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 309.0) internal successors, (9579), 31 states have internal predecessors, (9579), 0 states have call successors, (0), 0 states 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 22:32:14,688 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 309.0) internal successors, (9579), 31 states have internal predecessors, (9579), 0 states have call successors, (0), 0 states 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 22:32:14,689 INFO L175 Difference]: Start difference. First operand has 226 places, 559 transitions, 10028 flow. Second operand 30 states and 2970 transitions. [2023-11-06 22:32:14,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 755 transitions, 14296 flow [2023-11-06 22:32:14,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 755 transitions, 13315 flow, removed 274 selfloop flow, removed 15 redundant places. [2023-11-06 22:32:15,084 INFO L231 Difference]: Finished difference. Result has 241 places, 623 transitions, 11457 flow [2023-11-06 22:32:15,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=8242, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=11457, PETRI_PLACES=241, PETRI_TRANSITIONS=623} [2023-11-06 22:32:15,085 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 210 predicate places. [2023-11-06 22:32:15,085 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 623 transitions, 11457 flow [2023-11-06 22:32:15,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 95.2) internal successors, (3332), 35 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states 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 22:32:15,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:15,086 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:15,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-06 22:32:15,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:15,288 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:32:15,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:15,289 INFO L85 PathProgramCache]: Analyzing trace with hash 491889401, now seen corresponding path program 6 times [2023-11-06 22:32:15,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:15,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147525921] [2023-11-06 22:32:15,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:15,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:32:15,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:15,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147525921] [2023-11-06 22:32:15,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147525921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:15,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658816089] [2023-11-06 22:32:15,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:32:15,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:15,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:15,488 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:15,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:32:15,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:32:15,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:15,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:32:15,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:15,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:16,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658816089] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:16,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:16,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2023-11-06 22:32:16,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445181588] [2023-11-06 22:32:16,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:16,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 22:32:16,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:16,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 22:32:16,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2023-11-06 22:32:16,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 309 [2023-11-06 22:32:16,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 623 transitions, 11457 flow. Second operand has 30 states, 30 states have (on average 123.46666666666667) internal successors, (3704), 30 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states 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 22:32:16,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:16,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 309 [2023-11-06 22:32:16,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:18,035 INFO L124 PetriNetUnfolderBase]: 849/1955 cut-off events. [2023-11-06 22:32:18,036 INFO L125 PetriNetUnfolderBase]: For 27842/27847 co-relation queries the response was YES. [2023-11-06 22:32:18,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15634 conditions, 1955 events. 849/1955 cut-off events. For 27842/27847 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 14370 event pairs, 62 based on Foata normal form. 217/2136 useless extension candidates. Maximal degree in co-relation 15569. Up to 849 conditions per place. [2023-11-06 22:32:18,052 INFO L140 encePairwiseOnDemand]: 301/309 looper letters, 240 selfloop transitions, 132 changer transitions 59/433 dead transitions. [2023-11-06 22:32:18,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 433 transitions, 8830 flow [2023-11-06 22:32:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:32:18,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:32:18,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2147 transitions. [2023-11-06 22:32:18,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40871882733675996 [2023-11-06 22:32:18,056 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2147 transitions. [2023-11-06 22:32:18,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2147 transitions. [2023-11-06 22:32:18,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:18,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2147 transitions. [2023-11-06 22:32:18,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 126.29411764705883) internal successors, (2147), 17 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states 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 22:32:18,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 309.0) internal successors, (5562), 18 states have internal predecessors, (5562), 0 states have call successors, (0), 0 states 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 22:32:18,063 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 309.0) internal successors, (5562), 18 states have internal predecessors, (5562), 0 states have call successors, (0), 0 states 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 22:32:18,063 INFO L175 Difference]: Start difference. First operand has 241 places, 623 transitions, 11457 flow. Second operand 17 states and 2147 transitions. [2023-11-06 22:32:18,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 433 transitions, 8830 flow [2023-11-06 22:32:18,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 433 transitions, 7858 flow, removed 77 selfloop flow, removed 28 redundant places. [2023-11-06 22:32:18,187 INFO L231 Difference]: Finished difference. Result has 219 places, 335 transitions, 6059 flow [2023-11-06 22:32:18,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=6693, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6059, PETRI_PLACES=219, PETRI_TRANSITIONS=335} [2023-11-06 22:32:18,188 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 188 predicate places. [2023-11-06 22:32:18,188 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 335 transitions, 6059 flow [2023-11-06 22:32:18,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 123.46666666666667) internal successors, (3704), 30 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states 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 22:32:18,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:18,189 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:18,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:18,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:18,389 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:32:18,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:18,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1891096158, now seen corresponding path program 5 times [2023-11-06 22:32:18,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:18,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175975831] [2023-11-06 22:32:18,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:18,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:19,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:19,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175975831] [2023-11-06 22:32:19,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175975831] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:19,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470627303] [2023-11-06 22:32:19,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:32:19,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:19,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:19,915 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:19,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:32:20,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:32:20,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:20,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:32:20,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:20,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:20,852 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:20,853 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 104 [2023-11-06 22:32:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:32:20,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470627303] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:20,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:20,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 26 [2023-11-06 22:32:20,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991878817] [2023-11-06 22:32:20,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:20,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:32:20,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:20,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:32:20,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:32:23,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 309 [2023-11-06 22:32:23,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 335 transitions, 6059 flow. Second operand has 28 states, 28 states have (on average 116.5) internal successors, (3262), 28 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states 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 22:32:23,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:23,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 309 [2023-11-06 22:32:23,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:26,074 INFO L124 PetriNetUnfolderBase]: 1154/2342 cut-off events. [2023-11-06 22:32:26,074 INFO L125 PetriNetUnfolderBase]: For 28374/28382 co-relation queries the response was YES. [2023-11-06 22:32:26,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17763 conditions, 2342 events. 1154/2342 cut-off events. For 28374/28382 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15971 event pairs, 221 based on Foata normal form. 124/2315 useless extension candidates. Maximal degree in co-relation 17713. Up to 1423 conditions per place. [2023-11-06 22:32:26,092 INFO L140 encePairwiseOnDemand]: 300/309 looper letters, 340 selfloop transitions, 246 changer transitions 15/603 dead transitions. [2023-11-06 22:32:26,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 603 transitions, 10644 flow [2023-11-06 22:32:26,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-06 22:32:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-06 22:32:26,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 5258 transitions. [2023-11-06 22:32:26,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38673139158576053 [2023-11-06 22:32:26,099 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 5258 transitions. [2023-11-06 22:32:26,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 5258 transitions. [2023-11-06 22:32:26,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:26,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 5258 transitions. [2023-11-06 22:32:26,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 119.5) internal successors, (5258), 44 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states 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 22:32:26,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 309.0) internal successors, (13905), 45 states have internal predecessors, (13905), 0 states have call successors, (0), 0 states 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 22:32:26,120 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 309.0) internal successors, (13905), 45 states have internal predecessors, (13905), 0 states have call successors, (0), 0 states 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 22:32:26,120 INFO L175 Difference]: Start difference. First operand has 219 places, 335 transitions, 6059 flow. Second operand 44 states and 5258 transitions. [2023-11-06 22:32:26,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 603 transitions, 10644 flow [2023-11-06 22:32:26,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 603 transitions, 9900 flow, removed 31 selfloop flow, removed 22 redundant places. [2023-11-06 22:32:26,245 INFO L231 Difference]: Finished difference. Result has 242 places, 486 transitions, 8637 flow [2023-11-06 22:32:26,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=5188, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=8637, PETRI_PLACES=242, PETRI_TRANSITIONS=486} [2023-11-06 22:32:26,246 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 211 predicate places. [2023-11-06 22:32:26,246 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 486 transitions, 8637 flow [2023-11-06 22:32:26,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 116.5) internal successors, (3262), 28 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states 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 22:32:26,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:26,247 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:26,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:26,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:26,447 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:32:26,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash -799319089, now seen corresponding path program 7 times [2023-11-06 22:32:26,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:26,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395789316] [2023-11-06 22:32:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:26,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:27,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:27,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395789316] [2023-11-06 22:32:27,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395789316] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:27,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393991776] [2023-11-06 22:32:27,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:32:27,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:27,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:27,383 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:27,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:32:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:27,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:32:27,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:27,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:32:27,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-11-06 22:32:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:28,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:29,015 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:29,015 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 327 treesize of output 298 [2023-11-06 22:32:29,072 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:29,073 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 197 [2023-11-06 22:32:29,111 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:29,111 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 156 [2023-11-06 22:32:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:32:30,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393991776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:30,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:30,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 30 [2023-11-06 22:32:30,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307348667] [2023-11-06 22:32:30,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:30,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:32:30,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:30,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:32:30,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=892, Unknown=9, NotChecked=0, Total=992 [2023-11-06 22:32:36,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 309 [2023-11-06 22:32:36,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 486 transitions, 8637 flow. Second operand has 32 states, 32 states have (on average 95.3125) internal successors, (3050), 32 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states 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 22:32:36,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:36,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 309 [2023-11-06 22:32:36,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:39,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:32:42,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:32:44,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:32:46,512 INFO L124 PetriNetUnfolderBase]: 1922/3619 cut-off events. [2023-11-06 22:32:46,512 INFO L125 PetriNetUnfolderBase]: For 56827/56835 co-relation queries the response was YES. [2023-11-06 22:32:46,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30820 conditions, 3619 events. 1922/3619 cut-off events. For 56827/56835 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 24621 event pairs, 27 based on Foata normal form. 108/3699 useless extension candidates. Maximal degree in co-relation 30756. Up to 1561 conditions per place. [2023-11-06 22:32:46,547 INFO L140 encePairwiseOnDemand]: 300/309 looper letters, 133 selfloop transitions, 626 changer transitions 27/788 dead transitions. [2023-11-06 22:32:46,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 788 transitions, 15096 flow [2023-11-06 22:32:46,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:32:46,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 22:32:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3077 transitions. [2023-11-06 22:32:46,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3212235097609354 [2023-11-06 22:32:46,553 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3077 transitions. [2023-11-06 22:32:46,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3077 transitions. [2023-11-06 22:32:46,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:46,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3077 transitions. [2023-11-06 22:32:46,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 99.25806451612904) internal successors, (3077), 31 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states 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 22:32:46,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 309.0) internal successors, (9888), 32 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states 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 22:32:46,563 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 309.0) internal successors, (9888), 32 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states 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 22:32:46,563 INFO L175 Difference]: Start difference. First operand has 242 places, 486 transitions, 8637 flow. Second operand 31 states and 3077 transitions. [2023-11-06 22:32:46,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 788 transitions, 15096 flow [2023-11-06 22:32:46,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 788 transitions, 14218 flow, removed 371 selfloop flow, removed 14 redundant places. [2023-11-06 22:32:46,852 INFO L231 Difference]: Finished difference. Result has 263 places, 693 transitions, 13904 flow [2023-11-06 22:32:46,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=7896, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=13904, PETRI_PLACES=263, PETRI_TRANSITIONS=693} [2023-11-06 22:32:46,852 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 232 predicate places. [2023-11-06 22:32:46,853 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 693 transitions, 13904 flow [2023-11-06 22:32:46,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 95.3125) internal successors, (3050), 32 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states 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 22:32:46,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:46,853 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:46,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:47,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-06 22:32:47,054 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:32:47,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:47,054 INFO L85 PathProgramCache]: Analyzing trace with hash 2104764162, now seen corresponding path program 6 times [2023-11-06 22:32:47,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:47,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002401729] [2023-11-06 22:32:47,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:47,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:48,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:48,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002401729] [2023-11-06 22:32:48,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002401729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:48,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485327689] [2023-11-06 22:32:48,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:32:48,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:48,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:48,505 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:48,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e00708fc-cf45-4087-8b26-53c817add10d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 22:32:48,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:32:48,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:48,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 22:32:48,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:49,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:49,908 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-11-06 22:32:49,909 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 74 [2023-11-06 22:32:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:50,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485327689] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:50,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:50,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-06 22:32:50,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112474093] [2023-11-06 22:32:50,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:50,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:32:50,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:50,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:32:50,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=886, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:32:53,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 309 [2023-11-06 22:32:53,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 693 transitions, 13904 flow. Second operand has 35 states, 35 states have (on average 115.28571428571429) internal successors, (4035), 35 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states 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 22:32:53,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:53,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 309 [2023-11-06 22:32:53,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand