./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:17:50,238 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:17:50,333 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-12 02:17:50,338 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:17:50,339 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:17:50,376 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:17:50,377 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:17:50,378 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:17:50,378 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:17:50,379 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:17:50,380 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:17:50,381 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:17:50,381 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:17:50,382 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:17:50,382 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:17:50,383 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:17:50,383 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:17:50,384 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:17:50,384 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:17:50,385 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:17:50,385 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:17:50,390 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:17:50,390 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-12 02:17:50,390 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:17:50,391 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:17:50,391 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:17:50,392 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:17:50,392 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:17:50,393 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:17:50,393 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:17:50,394 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:17:50,395 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:17:50,396 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:17:50,396 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:17:50,396 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:17:50,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:17:50,397 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:17:50,397 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:17:50,397 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:17:50,397 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:17:50,397 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:17:50,398 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_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2023-11-12 02:17:50,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:17:50,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:17:50,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:17:50,756 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:17:50,756 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:17:50,757 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-12 02:17:53,767 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:17:53,985 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:17:53,985 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-12 02:17:53,994 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/data/0b79668e7/028ea6ab78324a799fe5cb4817755a5f/FLAG04c6222b5 [2023-11-12 02:17:54,009 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/data/0b79668e7/028ea6ab78324a799fe5cb4817755a5f [2023-11-12 02:17:54,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:17:54,026 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:17:54,029 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:17:54,030 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:17:54,035 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:17:54,038 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:17:54" (1/1) ... [2023-11-12 02:17:54,039 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c62b05d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:54, skipping insertion in model container [2023-11-12 02:17:54,039 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:17:54" (1/1) ... [2023-11-12 02:17:54,069 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:17:54,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:17:54,253 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:17:54,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:17:54,283 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:17:54,283 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:17:54,291 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:17:54,291 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:54 WrapperNode [2023-11-12 02:17:54,292 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:17:54,293 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:17:54,293 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:17:54,293 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:17:54,301 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:54" (1/1) ... [2023-11-12 02:17:54,308 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:54" (1/1) ... [2023-11-12 02:17:54,328 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 55 [2023-11-12 02:17:54,328 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:17:54,329 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:17:54,329 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:17:54,329 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:17:54,337 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:54" (1/1) ... [2023-11-12 02:17:54,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:54" (1/1) ... [2023-11-12 02:17:54,340 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:54" (1/1) ... [2023-11-12 02:17:54,340 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:54" (1/1) ... [2023-11-12 02:17:54,346 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:54" (1/1) ... [2023-11-12 02:17:54,349 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:54" (1/1) ... [2023-11-12 02:17:54,351 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:54" (1/1) ... [2023-11-12 02:17:54,352 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:54" (1/1) ... [2023-11-12 02:17:54,354 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:17:54,355 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:17:54,356 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:17:54,356 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:17:54,357 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:54" (1/1) ... [2023-11-12 02:17:54,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:17:54,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:54,395 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:17:54,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:17:54,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:17:54,493 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:17:54,494 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:17:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:17:54,494 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:17:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:17:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:17:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:17:54,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:17:54,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:17:54,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:17:54,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:17:54,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:17:54,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:17:54,499 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:17:54,653 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:17:54,655 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:17:54,873 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:17:54,991 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:17:54,992 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:17:54,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:17:54 BoogieIcfgContainer [2023-11-12 02:17:54,994 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:17:55,005 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:17:55,007 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:17:55,010 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:17:55,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:17:54" (1/3) ... [2023-11-12 02:17:55,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773df321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:17:55, skipping insertion in model container [2023-11-12 02:17:55,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:54" (2/3) ... [2023-11-12 02:17:55,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773df321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:17:55, skipping insertion in model container [2023-11-12 02:17:55,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:17:54" (3/3) ... [2023-11-12 02:17:55,013 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-11-12 02:17:55,022 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:17:55,031 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:17:55,031 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-12 02:17:55,031 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:17:55,100 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:17:55,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 94 transitions, 202 flow [2023-11-12 02:17:55,195 INFO L124 PetriNetUnfolderBase]: 6/92 cut-off events. [2023-11-12 02:17:55,195 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:17:55,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 92 events. 6/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 102 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2023-11-12 02:17:55,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 94 transitions, 202 flow [2023-11-12 02:17:55,206 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 70 transitions, 149 flow [2023-11-12 02:17:55,210 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:17:55,221 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 70 transitions, 149 flow [2023-11-12 02:17:55,224 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 70 transitions, 149 flow [2023-11-12 02:17:55,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 149 flow [2023-11-12 02:17:55,250 INFO L124 PetriNetUnfolderBase]: 5/70 cut-off events. [2023-11-12 02:17:55,251 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:17:55,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 70 events. 5/70 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 98 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2023-11-12 02:17:55,254 INFO L119 LiptonReduction]: Number of co-enabled transitions 900 [2023-11-12 02:17:58,358 INFO L134 LiptonReduction]: Checked pairs total: 853 [2023-11-12 02:17:58,358 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-11-12 02:17:58,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:17:58,384 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@112da1a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:17:58,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-12 02:17:58,388 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:17:58,388 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2023-11-12 02:17:58,389 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:17:58,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:58,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:17:58,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-12 02:17:58,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:58,396 INFO L85 PathProgramCache]: Analyzing trace with hash 11816298, now seen corresponding path program 1 times [2023-11-12 02:17:58,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:58,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836106502] [2023-11-12 02:17:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:58,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:58,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:58,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836106502] [2023-11-12 02:17:58,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836106502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:58,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:58,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:17:58,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575329549] [2023-11-12 02:17:58,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:58,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:17:58,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:17:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:17:58,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 157 [2023-11-12 02:17:58,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:58,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:58,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 157 [2023-11-12 02:17:58,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:58,943 INFO L124 PetriNetUnfolderBase]: 188/315 cut-off events. [2023-11-12 02:17:58,943 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-12 02:17:58,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 663 conditions, 315 events. 188/315 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1150 event pairs, 48 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 572. Up to 253 conditions per place. [2023-11-12 02:17:58,951 INFO L140 encePairwiseOnDemand]: 147/157 looper letters, 25 selfloop transitions, 4 changer transitions 3/32 dead transitions. [2023-11-12 02:17:58,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 143 flow [2023-11-12 02:17:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:17:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:17:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-11-12 02:17:58,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5668789808917197 [2023-11-12 02:17:58,978 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-11-12 02:17:58,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-11-12 02:17:58,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:58,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-11-12 02:17:58,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:59,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:59,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:59,004 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 51 flow. Second operand 3 states and 267 transitions. [2023-11-12 02:17:59,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 143 flow [2023-11-12 02:17:59,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 32 transitions, 135 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:17:59,013 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 78 flow [2023-11-12 02:17:59,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-11-12 02:17:59,020 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-11-12 02:17:59,020 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 78 flow [2023-11-12 02:17:59,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:59,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:59,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:17:59,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:17:59,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-12 02:17:59,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:59,022 INFO L85 PathProgramCache]: Analyzing trace with hash 11816338, now seen corresponding path program 1 times [2023-11-12 02:17:59,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:59,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229355814] [2023-11-12 02:17:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:59,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:59,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:59,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229355814] [2023-11-12 02:17:59,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229355814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:59,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:59,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:17:59,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027286911] [2023-11-12 02:17:59,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:59,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:17:59,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:59,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:17:59,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:17:59,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 157 [2023-11-12 02:17:59,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:59,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:59,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 157 [2023-11-12 02:17:59,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:59,241 INFO L124 PetriNetUnfolderBase]: 172/299 cut-off events. [2023-11-12 02:17:59,241 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:17:59,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 299 events. 172/299 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1122 event pairs, 127 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 551. Up to 281 conditions per place. [2023-11-12 02:17:59,245 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 25 selfloop transitions, 2 changer transitions 1/28 dead transitions. [2023-11-12 02:17:59,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 140 flow [2023-11-12 02:17:59,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:17:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:17:59,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2023-11-12 02:17:59,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535031847133758 [2023-11-12 02:17:59,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2023-11-12 02:17:59,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2023-11-12 02:17:59,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:59,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2023-11-12 02:17:59,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:59,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:59,253 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:59,253 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 78 flow. Second operand 3 states and 252 transitions. [2023-11-12 02:17:59,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 140 flow [2023-11-12 02:17:59,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:17:59,255 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 74 flow [2023-11-12 02:17:59,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-11-12 02:17:59,256 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-11-12 02:17:59,257 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 74 flow [2023-11-12 02:17:59,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:59,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:59,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:17:59,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:17:59,258 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-12 02:17:59,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:59,259 INFO L85 PathProgramCache]: Analyzing trace with hash 366307011, now seen corresponding path program 1 times [2023-11-12 02:17:59,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:59,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102537930] [2023-11-12 02:17:59,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:59,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:59,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:59,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102537930] [2023-11-12 02:17:59,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102537930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:59,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710513830] [2023-11-12 02:17:59,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:59,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:59,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:59,353 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:59,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:17:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:59,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:17:59,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:59,515 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:17:59,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710513830] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:59,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:17:59,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-12 02:17:59,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060370442] [2023-11-12 02:17:59,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:59,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:17:59,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:59,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:17:59,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:17:59,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 157 [2023-11-12 02:17:59,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 21 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:59,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:59,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 157 [2023-11-12 02:17:59,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:59,662 INFO L124 PetriNetUnfolderBase]: 135/234 cut-off events. [2023-11-12 02:17:59,662 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-12 02:17:59,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 234 events. 135/234 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 845 event pairs, 36 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 450. Up to 144 conditions per place. [2023-11-12 02:17:59,665 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 32 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-11-12 02:17:59,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 35 transitions, 180 flow [2023-11-12 02:17:59,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:17:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:17:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 332 transitions. [2023-11-12 02:17:59,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286624203821656 [2023-11-12 02:17:59,668 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 332 transitions. [2023-11-12 02:17:59,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 332 transitions. [2023-11-12 02:17:59,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:59,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 332 transitions. [2023-11-12 02:17:59,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:59,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:59,673 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:59,674 INFO L175 Difference]: Start difference. First operand has 27 places, 21 transitions, 74 flow. Second operand 4 states and 332 transitions. [2023-11-12 02:17:59,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 35 transitions, 180 flow [2023-11-12 02:17:59,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 35 transitions, 174 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-12 02:17:59,676 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 70 flow [2023-11-12 02:17:59,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-11-12 02:17:59,678 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-11-12 02:17:59,678 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 70 flow [2023-11-12 02:17:59,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:59,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:59,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:17:59,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:59,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:59,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-12 02:17:59,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:59,886 INFO L85 PathProgramCache]: Analyzing trace with hash 366307012, now seen corresponding path program 1 times [2023-11-12 02:17:59,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:59,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460334643] [2023-11-12 02:17:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:59,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:00,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:00,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460334643] [2023-11-12 02:18:00,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460334643] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:00,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668405565] [2023-11-12 02:18:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:00,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:00,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:00,006 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:00,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:18:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:00,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:18:00,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:00,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:00,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668405565] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:00,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:00,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:18:00,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249863530] [2023-11-12 02:18:00,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:00,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:18:00,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:00,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:18:00,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:18:00,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 157 [2023-11-12 02:18:00,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 75.42857142857143) internal successors, (528), 7 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:00,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:00,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 157 [2023-11-12 02:18:00,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:00,366 INFO L124 PetriNetUnfolderBase]: 357/582 cut-off events. [2023-11-12 02:18:00,367 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2023-11-12 02:18:00,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1618 conditions, 582 events. 357/582 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2518 event pairs, 78 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 1068. Up to 281 conditions per place. [2023-11-12 02:18:00,376 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 57 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2023-11-12 02:18:00,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 65 transitions, 346 flow [2023-11-12 02:18:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:18:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:18:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 512 transitions. [2023-11-12 02:18:00,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435244161358811 [2023-11-12 02:18:00,380 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 512 transitions. [2023-11-12 02:18:00,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 512 transitions. [2023-11-12 02:18:00,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:00,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 512 transitions. [2023-11-12 02:18:00,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.33333333333333) internal successors, (512), 6 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:00,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:00,390 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:00,391 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 70 flow. Second operand 6 states and 512 transitions. [2023-11-12 02:18:00,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 65 transitions, 346 flow [2023-11-12 02:18:00,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 65 transitions, 329 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-12 02:18:00,396 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 118 flow [2023-11-12 02:18:00,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-11-12 02:18:00,403 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2023-11-12 02:18:00,404 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 118 flow [2023-11-12 02:18:00,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.42857142857143) internal successors, (528), 7 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:00,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:00,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:18:00,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:00,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-12 02:18:00,614 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-12 02:18:00,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:00,614 INFO L85 PathProgramCache]: Analyzing trace with hash 366306971, now seen corresponding path program 1 times [2023-11-12 02:18:00,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:00,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743656384] [2023-11-12 02:18:00,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:00,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:00,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:00,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743656384] [2023-11-12 02:18:00,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743656384] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:00,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804678038] [2023-11-12 02:18:00,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:00,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:00,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:00,710 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:00,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:18:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:00,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:18:00,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:00,801 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:18:00,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804678038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:00,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:18:00,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-12 02:18:00,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458683687] [2023-11-12 02:18:00,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:00,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:18:00,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:00,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:18:00,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:18:00,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 157 [2023-11-12 02:18:00,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:00,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:00,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 157 [2023-11-12 02:18:00,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:00,949 INFO L124 PetriNetUnfolderBase]: 441/694 cut-off events. [2023-11-12 02:18:00,949 INFO L125 PetriNetUnfolderBase]: For 429/429 co-relation queries the response was YES. [2023-11-12 02:18:00,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2132 conditions, 694 events. 441/694 cut-off events. For 429/429 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2900 event pairs, 71 based on Foata normal form. 0/558 useless extension candidates. Maximal degree in co-relation 1886. Up to 428 conditions per place. [2023-11-12 02:18:00,956 INFO L140 encePairwiseOnDemand]: 148/157 looper letters, 34 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2023-11-12 02:18:00,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 46 transitions, 303 flow [2023-11-12 02:18:00,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:18:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:18:00,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 339 transitions. [2023-11-12 02:18:00,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398089171974523 [2023-11-12 02:18:00,959 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 339 transitions. [2023-11-12 02:18:00,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 339 transitions. [2023-11-12 02:18:00,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:00,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 339 transitions. [2023-11-12 02:18:00,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:00,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:00,964 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:00,964 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 118 flow. Second operand 4 states and 339 transitions. [2023-11-12 02:18:00,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 46 transitions, 303 flow [2023-11-12 02:18:00,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 46 transitions, 301 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:18:00,971 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 236 flow [2023-11-12 02:18:00,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=236, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-11-12 02:18:00,974 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2023-11-12 02:18:00,974 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 236 flow [2023-11-12 02:18:00,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:00,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:00,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:18:00,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:01,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:01,180 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-12 02:18:01,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:01,181 INFO L85 PathProgramCache]: Analyzing trace with hash 366306972, now seen corresponding path program 1 times [2023-11-12 02:18:01,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:01,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023417613] [2023-11-12 02:18:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:01,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:01,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:01,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:01,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023417613] [2023-11-12 02:18:01,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023417613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:01,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331786211] [2023-11-12 02:18:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:01,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:01,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:01,244 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:01,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:18:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:01,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:18:01,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:01,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:01,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331786211] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:01,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:01,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-12 02:18:01,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708452862] [2023-11-12 02:18:01,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:01,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:18:01,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:01,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:18:01,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:18:01,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 157 [2023-11-12 02:18:01,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 236 flow. Second operand has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:01,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:01,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 157 [2023-11-12 02:18:01,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:01,638 INFO L124 PetriNetUnfolderBase]: 617/1012 cut-off events. [2023-11-12 02:18:01,638 INFO L125 PetriNetUnfolderBase]: For 1534/1534 co-relation queries the response was YES. [2023-11-12 02:18:01,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3896 conditions, 1012 events. 617/1012 cut-off events. For 1534/1534 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4486 event pairs, 63 based on Foata normal form. 208/1152 useless extension candidates. Maximal degree in co-relation 3654. Up to 403 conditions per place. [2023-11-12 02:18:01,648 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 75 selfloop transitions, 34 changer transitions 6/115 dead transitions. [2023-11-12 02:18:01,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 115 transitions, 930 flow [2023-11-12 02:18:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:18:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:18:01,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 619 transitions. [2023-11-12 02:18:01,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632393084622384 [2023-11-12 02:18:01,655 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 619 transitions. [2023-11-12 02:18:01,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 619 transitions. [2023-11-12 02:18:01,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:01,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 619 transitions. [2023-11-12 02:18:01,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:01,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:01,661 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:01,661 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 236 flow. Second operand 7 states and 619 transitions. [2023-11-12 02:18:01,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 115 transitions, 930 flow [2023-11-12 02:18:01,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 115 transitions, 853 flow, removed 38 selfloop flow, removed 1 redundant places. [2023-11-12 02:18:01,672 INFO L231 Difference]: Finished difference. Result has 45 places, 61 transitions, 603 flow [2023-11-12 02:18:01,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=603, PETRI_PLACES=45, PETRI_TRANSITIONS=61} [2023-11-12 02:18:01,675 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 19 predicate places. [2023-11-12 02:18:01,675 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 61 transitions, 603 flow [2023-11-12 02:18:01,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:01,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:01,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:01,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 02:18:01,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:18:01,894 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-12 02:18:01,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:01,895 INFO L85 PathProgramCache]: Analyzing trace with hash 488165818, now seen corresponding path program 1 times [2023-11-12 02:18:01,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:01,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780716553] [2023-11-12 02:18:01,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:01,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:01,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:01,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780716553] [2023-11-12 02:18:01,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780716553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:01,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:01,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:18:01,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074937071] [2023-11-12 02:18:01,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:01,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:18:01,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:01,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:18:01,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:18:01,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 157 [2023-11-12 02:18:01,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 61 transitions, 603 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:01,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:01,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 157 [2023-11-12 02:18:01,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:02,177 INFO L124 PetriNetUnfolderBase]: 719/1188 cut-off events. [2023-11-12 02:18:02,177 INFO L125 PetriNetUnfolderBase]: For 2846/2846 co-relation queries the response was YES. [2023-11-12 02:18:02,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5092 conditions, 1188 events. 719/1188 cut-off events. For 2846/2846 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5623 event pairs, 279 based on Foata normal form. 6/1094 useless extension candidates. Maximal degree in co-relation 4810. Up to 1013 conditions per place. [2023-11-12 02:18:02,194 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 76 selfloop transitions, 5 changer transitions 1/82 dead transitions. [2023-11-12 02:18:02,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 82 transitions, 918 flow [2023-11-12 02:18:02,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:18:02,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:18:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2023-11-12 02:18:02,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5498938428874734 [2023-11-12 02:18:02,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 259 transitions. [2023-11-12 02:18:02,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 259 transitions. [2023-11-12 02:18:02,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:02,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 259 transitions. [2023-11-12 02:18:02,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:02,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:02,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:02,199 INFO L175 Difference]: Start difference. First operand has 45 places, 61 transitions, 603 flow. Second operand 3 states and 259 transitions. [2023-11-12 02:18:02,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 82 transitions, 918 flow [2023-11-12 02:18:02,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 82 transitions, 860 flow, removed 29 selfloop flow, removed 0 redundant places. [2023-11-12 02:18:02,222 INFO L231 Difference]: Finished difference. Result has 48 places, 65 transitions, 624 flow [2023-11-12 02:18:02,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=624, PETRI_PLACES=48, PETRI_TRANSITIONS=65} [2023-11-12 02:18:02,223 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2023-11-12 02:18:02,223 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 65 transitions, 624 flow [2023-11-12 02:18:02,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:02,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:02,224 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-12 02:18:02,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:18:02,224 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-12 02:18:02,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:02,225 INFO L85 PathProgramCache]: Analyzing trace with hash -859205165, now seen corresponding path program 2 times [2023-11-12 02:18:02,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:02,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106572759] [2023-11-12 02:18:02,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:02,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:02,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:02,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106572759] [2023-11-12 02:18:02,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106572759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:02,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755933248] [2023-11-12 02:18:02,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:18:02,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:02,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:02,337 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:02,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:18:02,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:18:02,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:02,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:18:02,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:18:02,427 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:18:02,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755933248] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:02,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:18:02,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-11-12 02:18:02,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946338662] [2023-11-12 02:18:02,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:02,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:18:02,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:02,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:18:02,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:18:02,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 157 [2023-11-12 02:18:02,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 65 transitions, 624 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:02,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:02,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 157 [2023-11-12 02:18:02,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:02,602 INFO L124 PetriNetUnfolderBase]: 521/858 cut-off events. [2023-11-12 02:18:02,602 INFO L125 PetriNetUnfolderBase]: For 2453/2453 co-relation queries the response was YES. [2023-11-12 02:18:02,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3544 conditions, 858 events. 521/858 cut-off events. For 2453/2453 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3649 event pairs, 287 based on Foata normal form. 54/886 useless extension candidates. Maximal degree in co-relation 3276. Up to 858 conditions per place. [2023-11-12 02:18:02,611 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-12 02:18:02,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 53 transitions, 589 flow [2023-11-12 02:18:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:18:02,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:18:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2023-11-12 02:18:02,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159235668789809 [2023-11-12 02:18:02,614 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2023-11-12 02:18:02,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2023-11-12 02:18:02,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:02,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2023-11-12 02:18:02,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:02,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:02,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:02,617 INFO L175 Difference]: Start difference. First operand has 48 places, 65 transitions, 624 flow. Second operand 3 states and 243 transitions. [2023-11-12 02:18:02,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 53 transitions, 589 flow [2023-11-12 02:18:02,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 558 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:18:02,629 INFO L231 Difference]: Finished difference. Result has 44 places, 53 transitions, 454 flow [2023-11-12 02:18:02,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=454, PETRI_PLACES=44, PETRI_TRANSITIONS=53} [2023-11-12 02:18:02,632 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2023-11-12 02:18:02,632 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 53 transitions, 454 flow [2023-11-12 02:18:02,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:02,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:02,633 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-12 02:18:02,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:02,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:02,845 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-12 02:18:02,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:02,845 INFO L85 PathProgramCache]: Analyzing trace with hash -859205205, now seen corresponding path program 2 times [2023-11-12 02:18:02,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:02,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350493852] [2023-11-12 02:18:02,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:02,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:02,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:02,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350493852] [2023-11-12 02:18:02,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350493852] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:02,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125299897] [2023-11-12 02:18:02,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:18:02,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:02,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:02,950 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:02,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:18:03,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:18:03,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:03,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:18:03,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:03,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:03,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125299897] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:03,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:03,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-12 02:18:03,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974434117] [2023-11-12 02:18:03,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:03,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:18:03,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:03,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:18:03,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:18:03,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 157 [2023-11-12 02:18:03,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 53 transitions, 454 flow. Second operand has 13 states, 13 states have (on average 77.53846153846153) internal successors, (1008), 13 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:03,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:03,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 157 [2023-11-12 02:18:03,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:03,698 INFO L124 PetriNetUnfolderBase]: 1249/2124 cut-off events. [2023-11-12 02:18:03,698 INFO L125 PetriNetUnfolderBase]: For 6945/6945 co-relation queries the response was YES. [2023-11-12 02:18:03,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8060 conditions, 2124 events. 1249/2124 cut-off events. For 6945/6945 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11105 event pairs, 96 based on Foata normal form. 304/2332 useless extension candidates. Maximal degree in co-relation 8041. Up to 631 conditions per place. [2023-11-12 02:18:03,718 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 120 selfloop transitions, 96 changer transitions 6/222 dead transitions. [2023-11-12 02:18:03,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 222 transitions, 1961 flow [2023-11-12 02:18:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:18:03,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-12 02:18:03,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1142 transitions. [2023-11-12 02:18:03,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595296423321902 [2023-11-12 02:18:03,723 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1142 transitions. [2023-11-12 02:18:03,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1142 transitions. [2023-11-12 02:18:03,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:03,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1142 transitions. [2023-11-12 02:18:03,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 87.84615384615384) internal successors, (1142), 13 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:03,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 157.0) internal successors, (2198), 14 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:03,735 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 157.0) internal successors, (2198), 14 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:03,735 INFO L175 Difference]: Start difference. First operand has 44 places, 53 transitions, 454 flow. Second operand 13 states and 1142 transitions. [2023-11-12 02:18:03,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 222 transitions, 1961 flow [2023-11-12 02:18:03,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 222 transitions, 1960 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:18:03,758 INFO L231 Difference]: Finished difference. Result has 66 places, 128 transitions, 1697 flow [2023-11-12 02:18:03,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1697, PETRI_PLACES=66, PETRI_TRANSITIONS=128} [2023-11-12 02:18:03,759 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 40 predicate places. [2023-11-12 02:18:03,760 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 128 transitions, 1697 flow [2023-11-12 02:18:03,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 77.53846153846153) internal successors, (1008), 13 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:03,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:03,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:03,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:03,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:03,967 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-12 02:18:03,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:03,967 INFO L85 PathProgramCache]: Analyzing trace with hash -2046758236, now seen corresponding path program 1 times [2023-11-12 02:18:03,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:03,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524207667] [2023-11-12 02:18:03,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:03,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:04,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:04,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524207667] [2023-11-12 02:18:04,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524207667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:04,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670458329] [2023-11-12 02:18:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:04,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:04,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:04,072 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:04,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:18:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:04,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:18:04,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:04,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:04,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670458329] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:04,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:18:04,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2023-11-12 02:18:04,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084363441] [2023-11-12 02:18:04,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:04,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:18:04,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:04,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:18:04,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:18:04,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 157 [2023-11-12 02:18:04,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 128 transitions, 1697 flow. Second operand has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:04,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:04,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 157 [2023-11-12 02:18:04,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:04,714 INFO L124 PetriNetUnfolderBase]: 977/1656 cut-off events. [2023-11-12 02:18:04,714 INFO L125 PetriNetUnfolderBase]: For 8966/8966 co-relation queries the response was YES. [2023-11-12 02:18:04,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7340 conditions, 1656 events. 977/1656 cut-off events. For 8966/8966 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8330 event pairs, 177 based on Foata normal form. 94/1750 useless extension candidates. Maximal degree in co-relation 7309. Up to 1472 conditions per place. [2023-11-12 02:18:04,730 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 112 selfloop transitions, 4 changer transitions 6/122 dead transitions. [2023-11-12 02:18:04,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 122 transitions, 1698 flow [2023-11-12 02:18:04,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:18:04,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:18:04,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2023-11-12 02:18:04,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5207006369426752 [2023-11-12 02:18:04,732 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 327 transitions. [2023-11-12 02:18:04,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 327 transitions. [2023-11-12 02:18:04,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:04,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 327 transitions. [2023-11-12 02:18:04,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:04,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:04,737 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:04,737 INFO L175 Difference]: Start difference. First operand has 66 places, 128 transitions, 1697 flow. Second operand 4 states and 327 transitions. [2023-11-12 02:18:04,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 122 transitions, 1698 flow [2023-11-12 02:18:04,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 122 transitions, 1539 flow, removed 72 selfloop flow, removed 4 redundant places. [2023-11-12 02:18:04,782 INFO L231 Difference]: Finished difference. Result has 66 places, 98 transitions, 1156 flow [2023-11-12 02:18:04,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1156, PETRI_PLACES=66, PETRI_TRANSITIONS=98} [2023-11-12 02:18:04,784 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 40 predicate places. [2023-11-12 02:18:04,784 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 98 transitions, 1156 flow [2023-11-12 02:18:04,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:04,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:04,784 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-12 02:18:04,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:04,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:18:04,991 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-12 02:18:04,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:04,992 INFO L85 PathProgramCache]: Analyzing trace with hash -900875253, now seen corresponding path program 3 times [2023-11-12 02:18:04,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:04,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683034117] [2023-11-12 02:18:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:04,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:05,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:05,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683034117] [2023-11-12 02:18:05,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683034117] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:05,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633357496] [2023-11-12 02:18:05,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:18:05,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:05,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:05,210 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:05,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:18:05,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-12 02:18:05,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:05,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:18:05,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:05,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:05,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633357496] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:05,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:05,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-12 02:18:05,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936730900] [2023-11-12 02:18:05,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:05,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:18:05,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:05,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:18:05,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:18:05,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 157 [2023-11-12 02:18:05,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 98 transitions, 1156 flow. Second operand has 25 states, 25 states have (on average 77.28) internal successors, (1932), 25 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:05,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:05,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 157 [2023-11-12 02:18:05,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:06,780 INFO L124 PetriNetUnfolderBase]: 2494/4367 cut-off events. [2023-11-12 02:18:06,780 INFO L125 PetriNetUnfolderBase]: For 59723/59723 co-relation queries the response was YES. [2023-11-12 02:18:06,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17189 conditions, 4367 events. 2494/4367 cut-off events. For 59723/59723 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 24804 event pairs, 183 based on Foata normal form. 578/4945 useless extension candidates. Maximal degree in co-relation 17160. Up to 1229 conditions per place. [2023-11-12 02:18:06,816 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 142 selfloop transitions, 242 changer transitions 66/450 dead transitions. [2023-11-12 02:18:06,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 450 transitions, 4583 flow [2023-11-12 02:18:06,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 02:18:06,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-12 02:18:06,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2183 transitions. [2023-11-12 02:18:06,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561783439490446 [2023-11-12 02:18:06,824 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2183 transitions. [2023-11-12 02:18:06,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2183 transitions. [2023-11-12 02:18:06,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:06,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2183 transitions. [2023-11-12 02:18:06,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 87.32) internal successors, (2183), 25 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:06,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 157.0) internal successors, (4082), 26 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:06,843 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 157.0) internal successors, (4082), 26 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:06,843 INFO L175 Difference]: Start difference. First operand has 66 places, 98 transitions, 1156 flow. Second operand 25 states and 2183 transitions. [2023-11-12 02:18:06,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 450 transitions, 4583 flow [2023-11-12 02:18:06,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 450 transitions, 4583 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:18:06,900 INFO L231 Difference]: Finished difference. Result has 112 places, 272 transitions, 4213 flow [2023-11-12 02:18:06,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4213, PETRI_PLACES=112, PETRI_TRANSITIONS=272} [2023-11-12 02:18:06,901 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 86 predicate places. [2023-11-12 02:18:06,901 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 272 transitions, 4213 flow [2023-11-12 02:18:06,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.28) internal successors, (1932), 25 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:06,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:06,902 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2023-11-12 02:18:06,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:07,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:18:07,108 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-12 02:18:07,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:07,109 INFO L85 PathProgramCache]: Analyzing trace with hash -124241717, now seen corresponding path program 4 times [2023-11-12 02:18:07,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:07,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302729856] [2023-11-12 02:18:07,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:07,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:07,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:07,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302729856] [2023-11-12 02:18:07,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302729856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:07,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366182591] [2023-11-12 02:18:07,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:18:07,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:07,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:07,744 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:07,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:18:07,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:18:07,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:07,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 02:18:07,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:07,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:08,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366182591] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:08,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:08,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-11-12 02:18:08,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907406302] [2023-11-12 02:18:08,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:08,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-12 02:18:08,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:08,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-12 02:18:08,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-12 02:18:08,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 157 [2023-11-12 02:18:08,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 272 transitions, 4213 flow. Second operand has 49 states, 49 states have (on average 77.14285714285714) internal successors, (3780), 49 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:08,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:08,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 157 [2023-11-12 02:18:08,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:13,838 INFO L124 PetriNetUnfolderBase]: 8110/14219 cut-off events. [2023-11-12 02:18:13,838 INFO L125 PetriNetUnfolderBase]: For 729305/729305 co-relation queries the response was YES. [2023-11-12 02:18:13,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62955 conditions, 14219 events. 8110/14219 cut-off events. For 729305/729305 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 91465 event pairs, 751 based on Foata normal form. 1226/15445 useless extension candidates. Maximal degree in co-relation 62902. Up to 4085 conditions per place. [2023-11-12 02:18:13,995 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 264 selfloop transitions, 882 changer transitions 138/1284 dead transitions. [2023-11-12 02:18:13,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 1284 transitions, 17076 flow [2023-11-12 02:18:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-12 02:18:13,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-12 02:18:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4295 transitions. [2023-11-12 02:18:14,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558299753022228 [2023-11-12 02:18:14,010 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4295 transitions. [2023-11-12 02:18:14,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4295 transitions. [2023-11-12 02:18:14,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:14,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4295 transitions. [2023-11-12 02:18:14,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 87.65306122448979) internal successors, (4295), 49 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:14,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 157.0) internal successors, (7850), 50 states have internal predecessors, (7850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:14,044 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 157.0) internal successors, (7850), 50 states have internal predecessors, (7850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:14,045 INFO L175 Difference]: Start difference. First operand has 112 places, 272 transitions, 4213 flow. Second operand 49 states and 4295 transitions. [2023-11-12 02:18:14,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 1284 transitions, 17076 flow [2023-11-12 02:18:14,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 1284 transitions, 14793 flow, removed 1134 selfloop flow, removed 2 redundant places. [2023-11-12 02:18:14,602 INFO L231 Difference]: Finished difference. Result has 204 places, 914 transitions, 14835 flow [2023-11-12 02:18:14,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=3896, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=14835, PETRI_PLACES=204, PETRI_TRANSITIONS=914} [2023-11-12 02:18:14,604 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 178 predicate places. [2023-11-12 02:18:14,604 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 914 transitions, 14835 flow [2023-11-12 02:18:14,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 77.14285714285714) internal successors, (3780), 49 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:14,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:14,606 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2023-11-12 02:18:14,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-12 02:18:14,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:14,808 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-12 02:18:14,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:14,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1528681035, now seen corresponding path program 5 times [2023-11-12 02:18:14,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:14,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775003722] [2023-11-12 02:18:14,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:14,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:17,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:17,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775003722] [2023-11-12 02:18:17,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775003722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:17,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513379199] [2023-11-12 02:18:17,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:18:17,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:17,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:17,218 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:17,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebe7889f-31dc-49c9-8692-b149ef10b18f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:18:17,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-11-12 02:18:17,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:17,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-12 02:18:17,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:17,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:21,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513379199] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:21,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:21,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2023-11-12 02:18:21,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451025315] [2023-11-12 02:18:21,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:21,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-12 02:18:21,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:21,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-12 02:18:21,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-12 02:18:21,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 157 [2023-11-12 02:18:21,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 914 transitions, 14835 flow. Second operand has 97 states, 97 states have (on average 77.0721649484536) internal successors, (7476), 97 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:21,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:21,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 157 [2023-11-12 02:18:21,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand