./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 4fc63b2a 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_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU --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 bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:11:34,144 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:11:34,250 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-10-31 22:11:34,259 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:11:34,262 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:11:34,302 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:11:34,303 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:11:34,303 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:11:34,304 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:11:34,308 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:11:34,309 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:11:34,309 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:11:34,310 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:11:34,310 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:11:34,311 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:11:34,311 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:11:34,311 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:11:34,312 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:11:34,312 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:11:34,314 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:11:34,314 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:11:34,315 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:11:34,315 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:11:34,316 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:11:34,316 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:11:34,316 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-10-31 22:11:34,316 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:11:34,317 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:11:34,317 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:11:34,317 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:11:34,318 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:11:34,318 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:11:34,318 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:11:34,318 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:11:34,319 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:11:34,321 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:11:34,322 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:11:34,322 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:11:34,323 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:11:34,324 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:11:34,324 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:11:34,324 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:11:34,325 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:11:34,325 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:11:34,325 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_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2024-10-31 22:11:34,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:11:34,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:11:34,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:11:34,697 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:11:34,697 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:11:34,699 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c Unable to find full path for "g++" [2024-10-31 22:11:36,811 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:11:37,019 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:11:37,020 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-10-31 22:11:37,028 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/data/126c7cddf/81b1cd5f0f554a49a9514d8814ed1ab5/FLAG248c16cf6 [2024-10-31 22:11:37,396 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/data/126c7cddf/81b1cd5f0f554a49a9514d8814ed1ab5 [2024-10-31 22:11:37,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:11:37,400 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:11:37,402 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:11:37,402 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:11:37,415 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:11:37,416 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,417 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d4f30e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37, skipping insertion in model container [2024-10-31 22:11:37,418 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,449 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:11:37,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:11:37,736 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:11:37,768 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:11:37,791 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:11:37,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37 WrapperNode [2024-10-31 22:11:37,792 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:11:37,793 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:11:37,794 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:11:37,794 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:11:37,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,812 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,840 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 129 [2024-10-31 22:11:37,841 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:11:37,842 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:11:37,842 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:11:37,842 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:11:37,853 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,853 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,856 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,874 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-31 22:11:37,874 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,875 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,886 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,891 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,893 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,895 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,898 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:11:37,899 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:11:37,900 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:11:37,900 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:11:37,901 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:11:37,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:37,943 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:11:37,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:11:37,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:11:37,975 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:11:37,975 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:11:37,975 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:11:37,975 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:11:37,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:11:37,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:11:37,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:11:37,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:11:37,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:11:37,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:11:37,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:11:37,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:11:37,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:11:37,979 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:11:38,104 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:11:38,106 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:11:38,541 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:11:38,542 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:11:38,906 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:11:38,907 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:11:38,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:11:38 BoogieIcfgContainer [2024-10-31 22:11:38,909 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:11:38,913 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:11:38,914 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:11:38,917 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:11:38,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:11:37" (1/3) ... [2024-10-31 22:11:38,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@193ebc49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:11:38, skipping insertion in model container [2024-10-31 22:11:38,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37" (2/3) ... [2024-10-31 22:11:38,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@193ebc49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:11:38, skipping insertion in model container [2024-10-31 22:11:38,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:11:38" (3/3) ... [2024-10-31 22:11:38,920 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2024-10-31 22:11:38,935 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:11:38,935 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-10-31 22:11:38,935 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:11:38,990 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:11:39,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 60 transitions, 134 flow [2024-10-31 22:11:39,072 INFO L124 PetriNetUnfolderBase]: 10/58 cut-off events. [2024-10-31 22:11:39,073 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:11:39,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 58 events. 10/58 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 155 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 43. Up to 3 conditions per place. [2024-10-31 22:11:39,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 60 transitions, 134 flow [2024-10-31 22:11:39,093 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 56 transitions, 121 flow [2024-10-31 22:11:39,115 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:11:39,122 INFO L333 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, 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;@7f75c9ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:11:39,123 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-10-31 22:11:39,127 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:11:39,127 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-10-31 22:11:39,127 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:11:39,127 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:39,128 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:11:39,129 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:39,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:39,135 INFO L85 PathProgramCache]: Analyzing trace with hash 586519, now seen corresponding path program 1 times [2024-10-31 22:11:39,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:39,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22511656] [2024-10-31 22:11:39,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:39,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:39,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:39,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22511656] [2024-10-31 22:11:39,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22511656] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:39,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:39,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:11:39,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881381494] [2024-10-31 22:11:39,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:39,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:11:39,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:39,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:11:39,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:11:39,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-31 22:11:39,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 56 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:39,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:39,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-31 22:11:39,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:39,970 INFO L124 PetriNetUnfolderBase]: 313/670 cut-off events. [2024-10-31 22:11:39,971 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-10-31 22:11:39,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1156 conditions, 670 events. 313/670 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3573 event pairs, 182 based on Foata normal form. 2/471 useless extension candidates. Maximal degree in co-relation 1066. Up to 452 conditions per place. [2024-10-31 22:11:39,980 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 35 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2024-10-31 22:11:39,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 62 transitions, 217 flow [2024-10-31 22:11:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:11:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:11:39,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-10-31 22:11:39,994 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-10-31 22:11:39,996 INFO L175 Difference]: Start difference. First operand has 53 places, 56 transitions, 121 flow. Second operand 4 states and 134 transitions. [2024-10-31 22:11:39,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 62 transitions, 217 flow [2024-10-31 22:11:40,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 62 transitions, 212 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:11:40,004 INFO L231 Difference]: Finished difference. Result has 56 places, 62 transitions, 176 flow [2024-10-31 22:11:40,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=56, PETRI_TRANSITIONS=62} [2024-10-31 22:11:40,010 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2024-10-31 22:11:40,011 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 62 transitions, 176 flow [2024-10-31 22:11:40,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,011 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:40,011 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-31 22:11:40,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:11:40,012 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:40,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:40,013 INFO L85 PathProgramCache]: Analyzing trace with hash 293700059, now seen corresponding path program 1 times [2024-10-31 22:11:40,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:40,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242570408] [2024-10-31 22:11:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:40,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:40,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:40,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242570408] [2024-10-31 22:11:40,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242570408] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:40,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943998181] [2024-10-31 22:11:40,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:40,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:40,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:40,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:40,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:11:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:40,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:11:40,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:40,337 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:11:40,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943998181] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:40,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:11:40,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-31 22:11:40,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810288633] [2024-10-31 22:11:40,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:40,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:11:40,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:40,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:11:40,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:11:40,368 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-31 22:11:40,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:40,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-31 22:11:40,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:40,711 INFO L124 PetriNetUnfolderBase]: 313/668 cut-off events. [2024-10-31 22:11:40,712 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-31 22:11:40,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 668 events. 313/668 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3543 event pairs, 182 based on Foata normal form. 2/472 useless extension candidates. Maximal degree in co-relation 1116. Up to 442 conditions per place. [2024-10-31 22:11:40,723 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 28 selfloop transitions, 12 changer transitions 0/60 dead transitions. [2024-10-31 22:11:40,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 60 transitions, 248 flow [2024-10-31 22:11:40,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:11:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:11:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-10-31 22:11:40,726 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-10-31 22:11:40,726 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 176 flow. Second operand 6 states and 174 transitions. [2024-10-31 22:11:40,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 60 transitions, 248 flow [2024-10-31 22:11:40,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:11:40,734 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 192 flow [2024-10-31 22:11:40,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2024-10-31 22:11:40,737 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2024-10-31 22:11:40,737 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 192 flow [2024-10-31 22:11:40,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,738 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:40,738 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-10-31 22:11:40,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:11:40,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:40,942 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:40,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:40,953 INFO L85 PathProgramCache]: Analyzing trace with hash 514767822, now seen corresponding path program 1 times [2024-10-31 22:11:40,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:40,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565257007] [2024-10-31 22:11:40,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:40,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:41,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:41,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565257007] [2024-10-31 22:11:41,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565257007] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:41,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236635975] [2024-10-31 22:11:41,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:41,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:41,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:41,146 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:41,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:11:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:11:41,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:41,267 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:41,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236635975] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:41,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:41,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-10-31 22:11:41,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308880560] [2024-10-31 22:11:41,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:41,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 22:11:41,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:41,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 22:11:41,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:11:41,376 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-31 22:11:41,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 192 flow. Second operand has 12 states, 12 states have (on average 23.083333333333332) internal successors, (277), 12 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:41,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:41,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-31 22:11:41,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:41,677 INFO L124 PetriNetUnfolderBase]: 319/692 cut-off events. [2024-10-31 22:11:41,677 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-10-31 22:11:41,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1260 conditions, 692 events. 319/692 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3767 event pairs, 182 based on Foata normal form. 6/499 useless extension candidates. Maximal degree in co-relation 1118. Up to 453 conditions per place. [2024-10-31 22:11:41,683 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 33 selfloop transitions, 25 changer transitions 0/78 dead transitions. [2024-10-31 22:11:41,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 422 flow [2024-10-31 22:11:41,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:11:41,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 22:11:41,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 284 transitions. [2024-10-31 22:11:41,687 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2024-10-31 22:11:41,690 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 192 flow. Second operand 10 states and 284 transitions. [2024-10-31 22:11:41,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 422 flow [2024-10-31 22:11:41,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 364 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-10-31 22:11:41,694 INFO L231 Difference]: Finished difference. Result has 66 places, 78 transitions, 332 flow [2024-10-31 22:11:41,694 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=332, PETRI_PLACES=66, PETRI_TRANSITIONS=78} [2024-10-31 22:11:41,697 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 13 predicate places. [2024-10-31 22:11:41,697 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 78 transitions, 332 flow [2024-10-31 22:11:41,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.083333333333332) internal successors, (277), 12 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:41,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:41,698 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:41,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:11:41,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:41,899 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:41,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:41,899 INFO L85 PathProgramCache]: Analyzing trace with hash -2054500936, now seen corresponding path program 1 times [2024-10-31 22:11:41,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:41,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529402255] [2024-10-31 22:11:41,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:41,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:42,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:42,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529402255] [2024-10-31 22:11:42,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529402255] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:42,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:42,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:42,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253474903] [2024-10-31 22:11:42,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:42,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:11:42,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:42,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:11:42,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:11:42,043 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-10-31 22:11:42,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 78 transitions, 332 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:42,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:42,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-10-31 22:11:42,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:42,328 INFO L124 PetriNetUnfolderBase]: 558/1013 cut-off events. [2024-10-31 22:11:42,328 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-10-31 22:11:42,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1978 conditions, 1013 events. 558/1013 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4838 event pairs, 254 based on Foata normal form. 18/769 useless extension candidates. Maximal degree in co-relation 1911. Up to 633 conditions per place. [2024-10-31 22:11:42,336 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 87 selfloop transitions, 4 changer transitions 0/110 dead transitions. [2024-10-31 22:11:42,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 110 transitions, 582 flow [2024-10-31 22:11:42,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:11:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:11:42,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 161 transitions. [2024-10-31 22:11:42,338 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2024-10-31 22:11:42,338 INFO L175 Difference]: Start difference. First operand has 66 places, 78 transitions, 332 flow. Second operand 4 states and 161 transitions. [2024-10-31 22:11:42,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 110 transitions, 582 flow [2024-10-31 22:11:42,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 110 transitions, 558 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-10-31 22:11:42,343 INFO L231 Difference]: Finished difference. Result has 69 places, 81 transitions, 337 flow [2024-10-31 22:11:42,343 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=337, PETRI_PLACES=69, PETRI_TRANSITIONS=81} [2024-10-31 22:11:42,344 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 16 predicate places. [2024-10-31 22:11:42,344 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 81 transitions, 337 flow [2024-10-31 22:11:42,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:42,345 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:42,345 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:42,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:11:42,345 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:42,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:42,346 INFO L85 PathProgramCache]: Analyzing trace with hash 735012805, now seen corresponding path program 1 times [2024-10-31 22:11:42,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:42,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288078359] [2024-10-31 22:11:42,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:42,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:42,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:42,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288078359] [2024-10-31 22:11:42,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288078359] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:42,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:42,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:42,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141402384] [2024-10-31 22:11:42,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:42,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:11:42,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:42,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:11:42,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:42,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-31 22:11:42,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 81 transitions, 337 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:42,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:42,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-31 22:11:42,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:42,894 INFO L124 PetriNetUnfolderBase]: 1206/2270 cut-off events. [2024-10-31 22:11:42,894 INFO L125 PetriNetUnfolderBase]: For 371/371 co-relation queries the response was YES. [2024-10-31 22:11:42,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4500 conditions, 2270 events. 1206/2270 cut-off events. For 371/371 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13536 event pairs, 680 based on Foata normal form. 16/1764 useless extension candidates. Maximal degree in co-relation 4433. Up to 862 conditions per place. [2024-10-31 22:11:42,920 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 81 selfloop transitions, 10 changer transitions 0/110 dead transitions. [2024-10-31 22:11:42,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 110 transitions, 595 flow [2024-10-31 22:11:42,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:11:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:11:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-10-31 22:11:42,921 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-10-31 22:11:42,921 INFO L175 Difference]: Start difference. First operand has 69 places, 81 transitions, 337 flow. Second operand 5 states and 178 transitions. [2024-10-31 22:11:42,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 110 transitions, 595 flow [2024-10-31 22:11:42,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 110 transitions, 590 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:11:42,931 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 378 flow [2024-10-31 22:11:42,931 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=378, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-10-31 22:11:42,934 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 21 predicate places. [2024-10-31 22:11:42,934 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 378 flow [2024-10-31 22:11:42,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:42,934 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:42,934 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:42,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:11:42,935 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:42,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:42,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1495633667, now seen corresponding path program 1 times [2024-10-31 22:11:42,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:42,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843632038] [2024-10-31 22:11:42,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:42,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:43,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:43,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843632038] [2024-10-31 22:11:43,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843632038] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:43,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:43,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:43,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141331695] [2024-10-31 22:11:43,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:43,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:11:43,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:43,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:11:43,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:11:43,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-10-31 22:11:43,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 378 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:43,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:43,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-10-31 22:11:43,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:43,518 INFO L124 PetriNetUnfolderBase]: 1703/2931 cut-off events. [2024-10-31 22:11:43,518 INFO L125 PetriNetUnfolderBase]: For 513/553 co-relation queries the response was YES. [2024-10-31 22:11:43,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6107 conditions, 2931 events. 1703/2931 cut-off events. For 513/553 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 16052 event pairs, 770 based on Foata normal form. 50/2444 useless extension candidates. Maximal degree in co-relation 6036. Up to 1824 conditions per place. [2024-10-31 22:11:43,547 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 91 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2024-10-31 22:11:43,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 117 transitions, 662 flow [2024-10-31 22:11:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:11:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:11:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 159 transitions. [2024-10-31 22:11:43,549 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-10-31 22:11:43,549 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 378 flow. Second operand 4 states and 159 transitions. [2024-10-31 22:11:43,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 117 transitions, 662 flow [2024-10-31 22:11:43,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 117 transitions, 661 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:11:43,557 INFO L231 Difference]: Finished difference. Result has 78 places, 86 transitions, 406 flow [2024-10-31 22:11:43,557 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=406, PETRI_PLACES=78, PETRI_TRANSITIONS=86} [2024-10-31 22:11:43,558 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 25 predicate places. [2024-10-31 22:11:43,559 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 86 transitions, 406 flow [2024-10-31 22:11:43,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:43,559 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:43,559 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:43,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:11:43,560 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:43,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:43,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1310561114, now seen corresponding path program 1 times [2024-10-31 22:11:43,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:43,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087757584] [2024-10-31 22:11:43,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:43,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:43,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:43,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087757584] [2024-10-31 22:11:43,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087757584] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:43,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:43,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:11:43,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850343804] [2024-10-31 22:11:43,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:43,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:11:43,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:43,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:11:43,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:11:43,733 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-31 22:11:43,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 86 transitions, 406 flow. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:43,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:43,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-31 22:11:43,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:44,589 INFO L124 PetriNetUnfolderBase]: 3198/5792 cut-off events. [2024-10-31 22:11:44,590 INFO L125 PetriNetUnfolderBase]: For 2142/2150 co-relation queries the response was YES. [2024-10-31 22:11:44,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12907 conditions, 5792 events. 3198/5792 cut-off events. For 2142/2150 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 38494 event pairs, 1820 based on Foata normal form. 102/5158 useless extension candidates. Maximal degree in co-relation 12806. Up to 2199 conditions per place. [2024-10-31 22:11:44,728 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 107 selfloop transitions, 5 changer transitions 0/132 dead transitions. [2024-10-31 22:11:44,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 132 transitions, 825 flow [2024-10-31 22:11:44,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:11:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:11:44,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 159 transitions. [2024-10-31 22:11:44,730 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-10-31 22:11:44,730 INFO L175 Difference]: Start difference. First operand has 78 places, 86 transitions, 406 flow. Second operand 4 states and 159 transitions. [2024-10-31 22:11:44,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 132 transitions, 825 flow [2024-10-31 22:11:44,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 132 transitions, 820 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:11:44,746 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 440 flow [2024-10-31 22:11:44,746 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=440, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2024-10-31 22:11:44,747 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 29 predicate places. [2024-10-31 22:11:44,747 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 440 flow [2024-10-31 22:11:44,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:44,747 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:44,748 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:44,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:11:44,748 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:44,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:44,748 INFO L85 PathProgramCache]: Analyzing trace with hash 617931440, now seen corresponding path program 1 times [2024-10-31 22:11:44,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:44,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917071812] [2024-10-31 22:11:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:44,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:44,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:44,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917071812] [2024-10-31 22:11:44,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917071812] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:44,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366875169] [2024-10-31 22:11:44,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:44,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:44,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:44,955 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:44,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:11:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:45,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:11:45,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:11:45,147 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:11:45,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366875169] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:45,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:11:45,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2024-10-31 22:11:45,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667881376] [2024-10-31 22:11:45,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:45,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:45,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:45,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:45,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:11:45,161 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-31 22:11:45,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 440 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:45,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:45,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-31 22:11:45,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:45,866 INFO L124 PetriNetUnfolderBase]: 2858/5340 cut-off events. [2024-10-31 22:11:45,867 INFO L125 PetriNetUnfolderBase]: For 1954/1962 co-relation queries the response was YES. [2024-10-31 22:11:45,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11521 conditions, 5340 events. 2858/5340 cut-off events. For 1954/1962 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 36078 event pairs, 1674 based on Foata normal form. 100/4782 useless extension candidates. Maximal degree in co-relation 11419. Up to 3910 conditions per place. [2024-10-31 22:11:45,930 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 59 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2024-10-31 22:11:45,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 84 transitions, 532 flow [2024-10-31 22:11:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:45,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:11:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-10-31 22:11:45,931 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-10-31 22:11:45,931 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 440 flow. Second operand 3 states and 106 transitions. [2024-10-31 22:11:45,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 84 transitions, 532 flow [2024-10-31 22:11:45,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 84 transitions, 515 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-10-31 22:11:45,944 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 397 flow [2024-10-31 22:11:45,946 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=397, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2024-10-31 22:11:45,947 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 25 predicate places. [2024-10-31 22:11:45,947 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 397 flow [2024-10-31 22:11:45,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:45,948 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:45,948 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:45,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:11:46,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:46,149 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:46,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:46,149 INFO L85 PathProgramCache]: Analyzing trace with hash 78074354, now seen corresponding path program 1 times [2024-10-31 22:11:46,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:46,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968922301] [2024-10-31 22:11:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:46,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:11:46,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:46,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968922301] [2024-10-31 22:11:46,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968922301] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:46,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:46,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:11:46,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992824675] [2024-10-31 22:11:46,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:46,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:11:46,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:46,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:11:46,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:46,339 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-31 22:11:46,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 397 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:46,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:46,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-31 22:11:46,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:47,097 INFO L124 PetriNetUnfolderBase]: 2242/4134 cut-off events. [2024-10-31 22:11:47,097 INFO L125 PetriNetUnfolderBase]: For 993/1005 co-relation queries the response was YES. [2024-10-31 22:11:47,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9101 conditions, 4134 events. 2242/4134 cut-off events. For 993/1005 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 25989 event pairs, 1242 based on Foata normal form. 0/3716 useless extension candidates. Maximal degree in co-relation 9081. Up to 2113 conditions per place. [2024-10-31 22:11:47,142 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 111 selfloop transitions, 5 changer transitions 0/138 dead transitions. [2024-10-31 22:11:47,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 138 transitions, 837 flow [2024-10-31 22:11:47,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:11:47,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:11:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 200 transitions. [2024-10-31 22:11:47,144 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-10-31 22:11:47,144 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 397 flow. Second operand 5 states and 200 transitions. [2024-10-31 22:11:47,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 138 transitions, 837 flow [2024-10-31 22:11:47,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 138 transitions, 836 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:11:47,155 INFO L231 Difference]: Finished difference. Result has 83 places, 86 transitions, 425 flow [2024-10-31 22:11:47,156 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=425, PETRI_PLACES=83, PETRI_TRANSITIONS=86} [2024-10-31 22:11:47,157 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 30 predicate places. [2024-10-31 22:11:47,158 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 86 transitions, 425 flow [2024-10-31 22:11:47,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:47,158 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:47,158 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:47,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:11:47,159 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:47,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:47,160 INFO L85 PathProgramCache]: Analyzing trace with hash -510845410, now seen corresponding path program 1 times [2024-10-31 22:11:47,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:47,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458283577] [2024-10-31 22:11:47,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:47,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:47,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:47,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458283577] [2024-10-31 22:11:47,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458283577] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:47,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359591403] [2024-10-31 22:11:47,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:47,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:47,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:47,367 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:47,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:11:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:47,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:11:47,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:11:47,539 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:11:47,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359591403] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:47,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:11:47,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2024-10-31 22:11:47,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365068032] [2024-10-31 22:11:47,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:47,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:11:47,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:47,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:11:47,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:11:47,559 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-31 22:11:47,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 86 transitions, 425 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:47,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:47,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-31 22:11:47,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:48,024 INFO L124 PetriNetUnfolderBase]: 2048/3876 cut-off events. [2024-10-31 22:11:48,024 INFO L125 PetriNetUnfolderBase]: For 1683/1687 co-relation queries the response was YES. [2024-10-31 22:11:48,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8538 conditions, 3876 events. 2048/3876 cut-off events. For 1683/1687 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 24143 event pairs, 1240 based on Foata normal form. 124/3670 useless extension candidates. Maximal degree in co-relation 8515. Up to 2875 conditions per place. [2024-10-31 22:11:48,071 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 55 selfloop transitions, 6 changer transitions 0/82 dead transitions. [2024-10-31 22:11:48,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 82 transitions, 521 flow [2024-10-31 22:11:48,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:11:48,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:11:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-10-31 22:11:48,072 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-10-31 22:11:48,072 INFO L175 Difference]: Start difference. First operand has 83 places, 86 transitions, 425 flow. Second operand 4 states and 130 transitions. [2024-10-31 22:11:48,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 82 transitions, 521 flow [2024-10-31 22:11:48,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 501 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-31 22:11:48,081 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 391 flow [2024-10-31 22:11:48,082 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=391, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-10-31 22:11:48,083 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 26 predicate places. [2024-10-31 22:11:48,084 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 391 flow [2024-10-31 22:11:48,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:48,084 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:48,084 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:48,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:11:48,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:48,287 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:48,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:48,288 INFO L85 PathProgramCache]: Analyzing trace with hash 522411708, now seen corresponding path program 1 times [2024-10-31 22:11:48,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:48,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126524379] [2024-10-31 22:11:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:48,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:11:48,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:48,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126524379] [2024-10-31 22:11:48,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126524379] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:48,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:48,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:11:48,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585986632] [2024-10-31 22:11:48,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:48,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:11:48,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:48,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:11:48,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:48,444 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-31 22:11:48,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 391 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:48,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:48,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-31 22:11:48,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:48,897 INFO L124 PetriNetUnfolderBase]: 1840/3398 cut-off events. [2024-10-31 22:11:48,897 INFO L125 PetriNetUnfolderBase]: For 1111/1115 co-relation queries the response was YES. [2024-10-31 22:11:48,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7606 conditions, 3398 events. 1840/3398 cut-off events. For 1111/1115 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 19986 event pairs, 1072 based on Foata normal form. 0/3118 useless extension candidates. Maximal degree in co-relation 7586. Up to 2151 conditions per place. [2024-10-31 22:11:48,931 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 69 selfloop transitions, 3 changer transitions 32/122 dead transitions. [2024-10-31 22:11:48,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 122 transitions, 756 flow [2024-10-31 22:11:48,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:11:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:11:48,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 191 transitions. [2024-10-31 22:11:48,933 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2024-10-31 22:11:48,933 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 391 flow. Second operand 5 states and 191 transitions. [2024-10-31 22:11:48,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 122 transitions, 756 flow [2024-10-31 22:11:48,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 122 transitions, 749 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:11:48,941 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 381 flow [2024-10-31 22:11:48,942 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=381, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2024-10-31 22:11:48,942 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 30 predicate places. [2024-10-31 22:11:48,942 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 381 flow [2024-10-31 22:11:48,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:48,943 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:48,943 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-10-31 22:11:48,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:11:48,943 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:48,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:48,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1283735314, now seen corresponding path program 2 times [2024-10-31 22:11:48,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:48,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058371549] [2024-10-31 22:11:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:48,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:49,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:49,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058371549] [2024-10-31 22:11:49,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058371549] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:49,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199008845] [2024-10-31 22:11:49,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:11:49,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:49,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:49,197 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:49,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:11:49,272 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:11:49,272 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:11:49,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:11:49,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-31 22:11:49,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-31 22:11:49,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199008845] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:49,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:49,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2024-10-31 22:11:49,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158335842] [2024-10-31 22:11:49,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:49,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:11:49,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:49,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:11:49,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:11:49,427 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-31 22:11:49,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 381 flow. Second operand has 14 states, 14 states have (on average 23.142857142857142) internal successors, (324), 14 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:49,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:49,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-31 22:11:49,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:50,281 INFO L124 PetriNetUnfolderBase]: 1511/2881 cut-off events. [2024-10-31 22:11:50,281 INFO L125 PetriNetUnfolderBase]: For 1007/1011 co-relation queries the response was YES. [2024-10-31 22:11:50,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6568 conditions, 2881 events. 1511/2881 cut-off events. For 1007/1011 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 17070 event pairs, 920 based on Foata normal form. 4/2769 useless extension candidates. Maximal degree in co-relation 6546. Up to 2117 conditions per place. [2024-10-31 22:11:50,306 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 33 selfloop transitions, 34 changer transitions 0/85 dead transitions. [2024-10-31 22:11:50,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 85 transitions, 545 flow [2024-10-31 22:11:50,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-31 22:11:50,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-31 22:11:50,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 594 transitions. [2024-10-31 22:11:50,310 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-10-31 22:11:50,310 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 381 flow. Second operand 24 states and 594 transitions. [2024-10-31 22:11:50,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 85 transitions, 545 flow [2024-10-31 22:11:50,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 85 transitions, 532 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-31 22:11:50,320 INFO L231 Difference]: Finished difference. Result has 101 places, 85 transitions, 479 flow [2024-10-31 22:11:50,320 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=479, PETRI_PLACES=101, PETRI_TRANSITIONS=85} [2024-10-31 22:11:50,321 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 48 predicate places. [2024-10-31 22:11:50,322 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 85 transitions, 479 flow [2024-10-31 22:11:50,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.142857142857142) internal successors, (324), 14 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:50,323 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:50,323 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:50,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:11:50,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:50,527 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:50,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:50,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2053061558, now seen corresponding path program 1 times [2024-10-31 22:11:50,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:50,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961881167] [2024-10-31 22:11:50,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:50,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:11:50,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:50,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961881167] [2024-10-31 22:11:50,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961881167] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:50,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:50,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:11:50,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043055822] [2024-10-31 22:11:50,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:50,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:11:50,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:50,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:11:50,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:50,763 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-31 22:11:50,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 85 transitions, 479 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:50,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:50,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-31 22:11:50,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:51,166 INFO L124 PetriNetUnfolderBase]: 1209/2287 cut-off events. [2024-10-31 22:11:51,166 INFO L125 PetriNetUnfolderBase]: For 746/750 co-relation queries the response was YES. [2024-10-31 22:11:51,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5147 conditions, 2287 events. 1209/2287 cut-off events. For 746/750 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 12598 event pairs, 704 based on Foata normal form. 0/2071 useless extension candidates. Maximal degree in co-relation 5125. Up to 1174 conditions per place. [2024-10-31 22:11:51,188 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 93 selfloop transitions, 10 changer transitions 4/124 dead transitions. [2024-10-31 22:11:51,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 124 transitions, 811 flow [2024-10-31 22:11:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:11:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:11:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-10-31 22:11:51,190 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6566666666666666 [2024-10-31 22:11:51,190 INFO L175 Difference]: Start difference. First operand has 101 places, 85 transitions, 479 flow. Second operand 5 states and 197 transitions. [2024-10-31 22:11:51,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 124 transitions, 811 flow [2024-10-31 22:11:51,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 124 transitions, 711 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-10-31 22:11:51,196 INFO L231 Difference]: Finished difference. Result has 95 places, 87 transitions, 420 flow [2024-10-31 22:11:51,196 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=420, PETRI_PLACES=95, PETRI_TRANSITIONS=87} [2024-10-31 22:11:51,197 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 42 predicate places. [2024-10-31 22:11:51,197 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 87 transitions, 420 flow [2024-10-31 22:11:51,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:51,197 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:51,197 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:51,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:11:51,198 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:51,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:51,198 INFO L85 PathProgramCache]: Analyzing trace with hash 109569920, now seen corresponding path program 1 times [2024-10-31 22:11:51,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:51,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631040356] [2024-10-31 22:11:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:51,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:11:51,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:51,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631040356] [2024-10-31 22:11:51,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631040356] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:51,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:51,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:11:51,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016120025] [2024-10-31 22:11:51,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:51,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:11:51,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:51,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:11:51,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:51,410 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-31 22:11:51,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 87 transitions, 420 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:51,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:51,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-31 22:11:51,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:51,906 INFO L124 PetriNetUnfolderBase]: 1021/1947 cut-off events. [2024-10-31 22:11:51,906 INFO L125 PetriNetUnfolderBase]: For 829/831 co-relation queries the response was YES. [2024-10-31 22:11:51,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4464 conditions, 1947 events. 1021/1947 cut-off events. For 829/831 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 10163 event pairs, 620 based on Foata normal form. 0/1813 useless extension candidates. Maximal degree in co-relation 4443. Up to 1189 conditions per place. [2024-10-31 22:11:51,925 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 60 selfloop transitions, 7 changer transitions 28/112 dead transitions. [2024-10-31 22:11:51,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 112 transitions, 677 flow [2024-10-31 22:11:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:11:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:11:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 188 transitions. [2024-10-31 22:11:51,927 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-10-31 22:11:51,927 INFO L175 Difference]: Start difference. First operand has 95 places, 87 transitions, 420 flow. Second operand 5 states and 188 transitions. [2024-10-31 22:11:51,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 112 transitions, 677 flow [2024-10-31 22:11:51,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 112 transitions, 662 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:11:51,934 INFO L231 Difference]: Finished difference. Result has 99 places, 84 transitions, 400 flow [2024-10-31 22:11:51,935 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=400, PETRI_PLACES=99, PETRI_TRANSITIONS=84} [2024-10-31 22:11:51,936 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 46 predicate places. [2024-10-31 22:11:51,937 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 84 transitions, 400 flow [2024-10-31 22:11:51,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:51,937 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:51,937 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:51,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 22:11:51,938 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:51,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:51,938 INFO L85 PathProgramCache]: Analyzing trace with hash -292619549, now seen corresponding path program 1 times [2024-10-31 22:11:51,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:51,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660878305] [2024-10-31 22:11:51,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:51,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:11:52,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:52,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660878305] [2024-10-31 22:11:52,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660878305] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:52,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831819730] [2024-10-31 22:11:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:52,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:52,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:52,071 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:52,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:11:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:52,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:11:52,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:11:52,341 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:11:52,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831819730] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:52,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:52,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2024-10-31 22:11:52,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954170071] [2024-10-31 22:11:52,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:52,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 22:11:52,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:52,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 22:11:52,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:11:53,115 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-10-31 22:11:53,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 84 transitions, 400 flow. Second operand has 19 states, 19 states have (on average 21.0) internal successors, (399), 19 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:53,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:53,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-10-31 22:11:53,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:54,384 INFO L124 PetriNetUnfolderBase]: 1449/2543 cut-off events. [2024-10-31 22:11:54,384 INFO L125 PetriNetUnfolderBase]: For 1236/1280 co-relation queries the response was YES. [2024-10-31 22:11:54,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6208 conditions, 2543 events. 1449/2543 cut-off events. For 1236/1280 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 13393 event pairs, 416 based on Foata normal form. 52/2509 useless extension candidates. Maximal degree in co-relation 6185. Up to 516 conditions per place. [2024-10-31 22:11:54,409 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 155 selfloop transitions, 42 changer transitions 10/221 dead transitions. [2024-10-31 22:11:54,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 221 transitions, 1270 flow [2024-10-31 22:11:54,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:11:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-31 22:11:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 433 transitions. [2024-10-31 22:11:54,411 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5154761904761904 [2024-10-31 22:11:54,411 INFO L175 Difference]: Start difference. First operand has 99 places, 84 transitions, 400 flow. Second operand 14 states and 433 transitions. [2024-10-31 22:11:54,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 221 transitions, 1270 flow [2024-10-31 22:11:54,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 221 transitions, 1204 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-10-31 22:11:54,424 INFO L231 Difference]: Finished difference. Result has 101 places, 88 transitions, 482 flow [2024-10-31 22:11:54,424 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=482, PETRI_PLACES=101, PETRI_TRANSITIONS=88} [2024-10-31 22:11:54,425 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 48 predicate places. [2024-10-31 22:11:54,425 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 88 transitions, 482 flow [2024-10-31 22:11:54,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 21.0) internal successors, (399), 19 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:54,425 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:54,425 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1] [2024-10-31 22:11:54,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-31 22:11:54,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-31 22:11:54,629 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:54,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:54,630 INFO L85 PathProgramCache]: Analyzing trace with hash 693607989, now seen corresponding path program 1 times [2024-10-31 22:11:54,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:54,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138341042] [2024-10-31 22:11:54,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:54,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:54,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:54,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138341042] [2024-10-31 22:11:54,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138341042] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:54,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015567082] [2024-10-31 22:11:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:54,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:54,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:54,878 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:54,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:11:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:54,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:11:54,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:55,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:55,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015567082] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:55,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:55,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2024-10-31 22:11:55,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175018812] [2024-10-31 22:11:55,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:55,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-31 22:11:55,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:55,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-31 22:11:55,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2024-10-31 22:11:55,367 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-31 22:11:55,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 88 transitions, 482 flow. Second operand has 28 states, 28 states have (on average 23.071428571428573) internal successors, (646), 28 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:55,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:55,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-31 22:11:55,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:56,107 INFO L124 PetriNetUnfolderBase]: 1382/2661 cut-off events. [2024-10-31 22:11:56,107 INFO L125 PetriNetUnfolderBase]: For 1921/1921 co-relation queries the response was YES. [2024-10-31 22:11:56,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6372 conditions, 2661 events. 1382/2661 cut-off events. For 1921/1921 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 15189 event pairs, 848 based on Foata normal form. 14/2479 useless extension candidates. Maximal degree in co-relation 6352. Up to 1938 conditions per place. [2024-10-31 22:11:56,132 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 39 selfloop transitions, 72 changer transitions 0/130 dead transitions. [2024-10-31 22:11:56,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 130 transitions, 1061 flow [2024-10-31 22:11:56,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-31 22:11:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-31 22:11:56,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 683 transitions. [2024-10-31 22:11:56,136 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4378205128205128 [2024-10-31 22:11:56,136 INFO L175 Difference]: Start difference. First operand has 101 places, 88 transitions, 482 flow. Second operand 26 states and 683 transitions. [2024-10-31 22:11:56,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 130 transitions, 1061 flow [2024-10-31 22:11:56,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 130 transitions, 1020 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-10-31 22:11:56,147 INFO L231 Difference]: Finished difference. Result has 127 places, 130 transitions, 994 flow [2024-10-31 22:11:56,148 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=994, PETRI_PLACES=127, PETRI_TRANSITIONS=130} [2024-10-31 22:11:56,148 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 74 predicate places. [2024-10-31 22:11:56,148 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 130 transitions, 994 flow [2024-10-31 22:11:56,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 23.071428571428573) internal successors, (646), 28 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:56,150 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:56,150 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:56,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:11:56,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:56,354 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:56,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:56,355 INFO L85 PathProgramCache]: Analyzing trace with hash 767856493, now seen corresponding path program 1 times [2024-10-31 22:11:56,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:56,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576827115] [2024-10-31 22:11:56,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:56,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:11:56,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:56,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576827115] [2024-10-31 22:11:56,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576827115] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:56,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892156416] [2024-10-31 22:11:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:56,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:56,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:56,481 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:56,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:11:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:56,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:11:56,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:11:56,713 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:11:56,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892156416] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:56,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:56,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2024-10-31 22:11:56,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949514771] [2024-10-31 22:11:56,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:56,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 22:11:56,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:56,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 22:11:56,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:11:57,286 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-10-31 22:11:57,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 130 transitions, 994 flow. Second operand has 19 states, 19 states have (on average 21.210526315789473) internal successors, (403), 19 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:57,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:57,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-10-31 22:11:57,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:58,367 INFO L124 PetriNetUnfolderBase]: 1357/2444 cut-off events. [2024-10-31 22:11:58,368 INFO L125 PetriNetUnfolderBase]: For 1553/1569 co-relation queries the response was YES. [2024-10-31 22:11:58,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6030 conditions, 2444 events. 1357/2444 cut-off events. For 1553/1569 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12626 event pairs, 400 based on Foata normal form. 25/2305 useless extension candidates. Maximal degree in co-relation 6002. Up to 569 conditions per place. [2024-10-31 22:11:58,384 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 98 selfloop transitions, 71 changer transitions 67/249 dead transitions. [2024-10-31 22:11:58,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 249 transitions, 1836 flow [2024-10-31 22:11:58,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:11:58,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-31 22:11:58,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 426 transitions. [2024-10-31 22:11:58,386 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-10-31 22:11:58,386 INFO L175 Difference]: Start difference. First operand has 127 places, 130 transitions, 994 flow. Second operand 14 states and 426 transitions. [2024-10-31 22:11:58,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 249 transitions, 1836 flow [2024-10-31 22:11:58,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 249 transitions, 1651 flow, removed 54 selfloop flow, removed 12 redundant places. [2024-10-31 22:11:58,402 INFO L231 Difference]: Finished difference. Result has 128 places, 123 transitions, 917 flow [2024-10-31 22:11:58,402 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=917, PETRI_PLACES=128, PETRI_TRANSITIONS=123} [2024-10-31 22:11:58,403 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 75 predicate places. [2024-10-31 22:11:58,403 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 123 transitions, 917 flow [2024-10-31 22:11:58,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 21.210526315789473) internal successors, (403), 19 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:58,404 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:58,404 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:58,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-31 22:11:58,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-31 22:11:58,605 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:11:58,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:58,605 INFO L85 PathProgramCache]: Analyzing trace with hash 771933349, now seen corresponding path program 1 times [2024-10-31 22:11:58,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:58,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251720416] [2024-10-31 22:11:58,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:58,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 22:11:58,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:58,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251720416] [2024-10-31 22:11:58,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251720416] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:58,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775845669] [2024-10-31 22:11:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:58,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:58,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:58,719 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:58,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:11:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:58,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:11:58,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:11:58,957 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:11:59,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775845669] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:59,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:59,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2024-10-31 22:11:59,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26589661] [2024-10-31 22:11:59,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:59,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 22:11:59,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:59,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 22:11:59,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:11:59,598 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-10-31 22:11:59,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 123 transitions, 917 flow. Second operand has 19 states, 19 states have (on average 21.157894736842106) internal successors, (402), 19 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:59,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:59,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-10-31 22:11:59,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:12:00,649 INFO L124 PetriNetUnfolderBase]: 1659/2909 cut-off events. [2024-10-31 22:12:00,649 INFO L125 PetriNetUnfolderBase]: For 2546/2566 co-relation queries the response was YES. [2024-10-31 22:12:00,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7737 conditions, 2909 events. 1659/2909 cut-off events. For 2546/2566 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 14995 event pairs, 554 based on Foata normal form. 52/2900 useless extension candidates. Maximal degree in co-relation 7710. Up to 880 conditions per place. [2024-10-31 22:12:00,671 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 217 selfloop transitions, 69 changer transitions 10/309 dead transitions. [2024-10-31 22:12:00,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 309 transitions, 2440 flow [2024-10-31 22:12:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-31 22:12:00,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-31 22:12:00,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 505 transitions. [2024-10-31 22:12:00,673 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4950980392156863 [2024-10-31 22:12:00,674 INFO L175 Difference]: Start difference. First operand has 128 places, 123 transitions, 917 flow. Second operand 17 states and 505 transitions. [2024-10-31 22:12:00,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 309 transitions, 2440 flow [2024-10-31 22:12:00,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 309 transitions, 2240 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-10-31 22:12:00,693 INFO L231 Difference]: Finished difference. Result has 132 places, 160 transitions, 1451 flow [2024-10-31 22:12:00,694 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1451, PETRI_PLACES=132, PETRI_TRANSITIONS=160} [2024-10-31 22:12:00,694 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 79 predicate places. [2024-10-31 22:12:00,694 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 160 transitions, 1451 flow [2024-10-31 22:12:00,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 21.157894736842106) internal successors, (402), 19 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:12:00,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:12:00,695 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:00,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 22:12:00,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-31 22:12:00,899 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:12:00,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:00,900 INFO L85 PathProgramCache]: Analyzing trace with hash -227915218, now seen corresponding path program 1 times [2024-10-31 22:12:00,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:00,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092873785] [2024-10-31 22:12:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:00,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 22:12:01,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:01,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092873785] [2024-10-31 22:12:01,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092873785] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:12:01,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788046943] [2024-10-31 22:12:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:01,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:12:01,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:12:01,024 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:12:01,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 22:12:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:01,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:12:01,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:12:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:12:01,266 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:12:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:12:01,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788046943] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:12:01,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:12:01,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2024-10-31 22:12:01,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004271232] [2024-10-31 22:12:01,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:12:01,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 22:12:01,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:01,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 22:12:01,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:12:01,884 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-10-31 22:12:01,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 160 transitions, 1451 flow. Second operand has 19 states, 19 states have (on average 21.36842105263158) internal successors, (406), 19 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:12:01,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:12:01,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-10-31 22:12:01,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:12:02,766 INFO L124 PetriNetUnfolderBase]: 1881/3284 cut-off events. [2024-10-31 22:12:02,766 INFO L125 PetriNetUnfolderBase]: For 3705/3741 co-relation queries the response was YES. [2024-10-31 22:12:02,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8792 conditions, 3284 events. 1881/3284 cut-off events. For 3705/3741 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 16701 event pairs, 653 based on Foata normal form. 33/3115 useless extension candidates. Maximal degree in co-relation 8761. Up to 1171 conditions per place. [2024-10-31 22:12:02,793 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 152 selfloop transitions, 64 changer transitions 77/307 dead transitions. [2024-10-31 22:12:02,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 307 transitions, 2659 flow [2024-10-31 22:12:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-31 22:12:02,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-31 22:12:02,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 498 transitions. [2024-10-31 22:12:02,795 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48823529411764705 [2024-10-31 22:12:02,795 INFO L175 Difference]: Start difference. First operand has 132 places, 160 transitions, 1451 flow. Second operand 17 states and 498 transitions. [2024-10-31 22:12:02,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 307 transitions, 2659 flow [2024-10-31 22:12:02,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 307 transitions, 2593 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-10-31 22:12:02,815 INFO L231 Difference]: Finished difference. Result has 146 places, 158 transitions, 1557 flow [2024-10-31 22:12:02,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1557, PETRI_PLACES=146, PETRI_TRANSITIONS=158} [2024-10-31 22:12:02,816 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 93 predicate places. [2024-10-31 22:12:02,816 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 158 transitions, 1557 flow [2024-10-31 22:12:02,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 21.36842105263158) internal successors, (406), 19 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:12:02,817 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:12:02,817 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:02,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-31 22:12:03,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:12:03,021 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-31 22:12:03,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:03,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1516570991, now seen corresponding path program 2 times [2024-10-31 22:12:03,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:03,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796793755] [2024-10-31 22:12:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:03,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:12:03,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:03,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796793755] [2024-10-31 22:12:03,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796793755] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:12:03,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406629951] [2024-10-31 22:12:03,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:12:03,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:12:03,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:12:03,302 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:12:03,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0fbb155-40c4-47f4-b46f-8949d4065400/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 22:12:03,397 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:12:03,397 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:12:03,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 22:12:03,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:12:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:12:03,479 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:12:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:12:03,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406629951] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:12:03,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:12:03,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 3, 3] total 15 [2024-10-31 22:12:03,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428214100] [2024-10-31 22:12:03,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:12:03,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:12:03,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:03,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:12:03,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:12:03,846 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 60 [2024-10-31 22:12:03,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 158 transitions, 1557 flow. Second operand has 16 states, 16 states have (on average 17.3125) internal successors, (277), 16 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:12:03,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:12:03,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 60 [2024-10-31 22:12:03,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand