./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread/stack_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longer-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme --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 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:50:15,107 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:50:15,230 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-26 11:50:15,238 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:50:15,238 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:50:15,264 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:50:15,265 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:50:15,266 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:50:15,266 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:50:15,267 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:50:15,268 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:50:15,268 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:50:15,269 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:50:15,270 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:50:15,270 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:50:15,271 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:50:15,271 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:50:15,272 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:50:15,272 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:50:15,273 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:50:15,273 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:50:15,276 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:50:15,276 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:50:15,276 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:50:15,277 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-26 11:50:15,277 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:50:15,278 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:50:15,278 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:50:15,279 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:50:15,279 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:50:15,281 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:50:15,281 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:50:15,281 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:50:15,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:50:15,282 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:50:15,282 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:50:15,282 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:50:15,283 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:50:15,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:50:15,283 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:50:15,283 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:50:15,284 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:50:15,284 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:50:15,284 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:50:15,285 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_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2023-11-26 11:50:15,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:50:15,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:50:15,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:50:15,594 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:50:15,595 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:50:15,596 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread/stack_longer-2.i [2023-11-26 11:50:18,807 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:50:19,209 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:50:19,210 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/sv-benchmarks/c/pthread/stack_longer-2.i [2023-11-26 11:50:19,228 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/data/72169edce/8784076995134ae09e6923fac71d5e2c/FLAGd34c4b2d1 [2023-11-26 11:50:19,246 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/data/72169edce/8784076995134ae09e6923fac71d5e2c [2023-11-26 11:50:19,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:50:19,257 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:50:19,261 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:50:19,261 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:50:19,267 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:50:19,270 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:50:19" (1/1) ... [2023-11-26 11:50:19,271 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fee0ed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:19, skipping insertion in model container [2023-11-26 11:50:19,272 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:50:19" (1/1) ... [2023-11-26 11:50:19,344 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:50:19,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:50:19,880 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:50:19,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:50:20,019 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:50:20,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20 WrapperNode [2023-11-26 11:50:20,020 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:50:20,021 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:50:20,021 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:50:20,022 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:50:20,031 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,067 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,116 INFO L138 Inliner]: procedures = 278, calls = 41, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 168 [2023-11-26 11:50:20,116 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:50:20,117 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:50:20,117 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:50:20,117 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:50:20,129 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,135 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,161 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 3, 5, 2, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0, 0]. The 4 writes are split as follows [0, 2, 0, 1, 1]. [2023-11-26 11:50:20,161 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,162 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,173 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,177 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,180 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,182 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,187 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:50:20,188 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:50:20,188 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:50:20,188 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:50:20,189 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (1/1) ... [2023-11-26 11:50:20,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:50:20,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:20,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:50:20,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:50:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-26 11:50:20,294 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-26 11:50:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-26 11:50:20,294 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-26 11:50:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:50:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:50:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 11:50:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:50:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:50:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:50:20,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:50:20,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:50:20,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:50:20,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:50:20,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:50:20,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:50:20,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:50:20,300 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 11:50:20,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:50:20,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:50:20,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:50:20,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:50:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:50:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:50:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:50:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:50:20,307 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:50:20,514 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:50:20,517 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:50:20,857 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:50:21,116 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:50:21,117 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:50:21,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:50:21 BoogieIcfgContainer [2023-11-26 11:50:21,117 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:50:21,120 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:50:21,121 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:50:21,124 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:50:21,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:50:19" (1/3) ... [2023-11-26 11:50:21,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21626297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:50:21, skipping insertion in model container [2023-11-26 11:50:21,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:20" (2/3) ... [2023-11-26 11:50:21,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21626297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:50:21, skipping insertion in model container [2023-11-26 11:50:21,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:50:21" (3/3) ... [2023-11-26 11:50:21,128 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2023-11-26 11:50:21,138 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:50:21,148 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:50:21,148 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-26 11:50:21,148 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:50:21,214 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:50:21,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 49 transitions, 112 flow [2023-11-26 11:50:21,306 INFO L124 PetriNetUnfolderBase]: 5/47 cut-off events. [2023-11-26 11:50:21,307 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:50:21,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 47 events. 5/47 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 125 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-11-26 11:50:21,317 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 49 transitions, 112 flow [2023-11-26 11:50:21,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 45 transitions, 99 flow [2023-11-26 11:50:21,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:50:21,353 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4594126f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:50:21,354 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-26 11:50:21,376 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:50:21,376 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-11-26 11:50:21,376 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 11:50:21,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:21,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:21,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:21,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:21,384 INFO L85 PathProgramCache]: Analyzing trace with hash -363768998, now seen corresponding path program 1 times [2023-11-26 11:50:21,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:21,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276967267] [2023-11-26 11:50:21,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:21,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:21,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:21,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276967267] [2023-11-26 11:50:21,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276967267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:21,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:21,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:50:21,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569014843] [2023-11-26 11:50:21,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:21,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:21,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:21,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:21,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:21,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-26 11:50:21,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:21,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:21,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-26 11:50:21,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:22,493 INFO L124 PetriNetUnfolderBase]: 750/1483 cut-off events. [2023-11-26 11:50:22,493 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-11-26 11:50:22,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2755 conditions, 1483 events. 750/1483 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7891 event pairs, 234 based on Foata normal form. 41/1373 useless extension candidates. Maximal degree in co-relation 2569. Up to 713 conditions per place. [2023-11-26 11:50:22,518 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 60 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2023-11-26 11:50:22,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 79 transitions, 306 flow [2023-11-26 11:50:22,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:22,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:50:22,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2023-11-26 11:50:22,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2023-11-26 11:50:22,534 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 134 transitions. [2023-11-26 11:50:22,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 134 transitions. [2023-11-26 11:50:22,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:22,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 134 transitions. [2023-11-26 11:50:22,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:22,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:22,546 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:22,548 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 99 flow. Second operand 4 states and 134 transitions. [2023-11-26 11:50:22,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 79 transitions, 306 flow [2023-11-26 11:50:22,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 79 transitions, 297 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:50:22,557 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 130 flow [2023-11-26 11:50:22,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2023-11-26 11:50:22,564 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-11-26 11:50:22,564 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 130 flow [2023-11-26 11:50:22,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:22,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:22,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:22,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:50:22,565 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:22,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:22,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1255862108, now seen corresponding path program 1 times [2023-11-26 11:50:22,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:22,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170870502] [2023-11-26 11:50:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:22,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:22,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:22,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170870502] [2023-11-26 11:50:22,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170870502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:22,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:22,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:22,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886173011] [2023-11-26 11:50:22,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:22,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:22,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:22,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:22,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:22,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-26 11:50:22,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:22,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:22,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-26 11:50:22,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:23,323 INFO L124 PetriNetUnfolderBase]: 1218/2479 cut-off events. [2023-11-26 11:50:23,323 INFO L125 PetriNetUnfolderBase]: For 344/344 co-relation queries the response was YES. [2023-11-26 11:50:23,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4984 conditions, 2479 events. 1218/2479 cut-off events. For 344/344 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 14555 event pairs, 633 based on Foata normal form. 78/2389 useless extension candidates. Maximal degree in co-relation 4279. Up to 1345 conditions per place. [2023-11-26 11:50:23,343 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 74 selfloop transitions, 3 changer transitions 0/91 dead transitions. [2023-11-26 11:50:23,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 91 transitions, 411 flow [2023-11-26 11:50:23,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:50:23,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2023-11-26 11:50:23,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6887755102040817 [2023-11-26 11:50:23,346 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 135 transitions. [2023-11-26 11:50:23,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 135 transitions. [2023-11-26 11:50:23,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:23,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 135 transitions. [2023-11-26 11:50:23,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:23,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:23,350 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:23,350 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 130 flow. Second operand 4 states and 135 transitions. [2023-11-26 11:50:23,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 91 transitions, 411 flow [2023-11-26 11:50:23,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 91 transitions, 411 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:50:23,355 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 154 flow [2023-11-26 11:50:23,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-11-26 11:50:23,356 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 7 predicate places. [2023-11-26 11:50:23,356 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 154 flow [2023-11-26 11:50:23,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:23,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:23,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:23,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:50:23,357 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:23,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:23,358 INFO L85 PathProgramCache]: Analyzing trace with hash 933507215, now seen corresponding path program 1 times [2023-11-26 11:50:23,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:23,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696130346] [2023-11-26 11:50:23,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:23,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:23,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:23,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696130346] [2023-11-26 11:50:23,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696130346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:23,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:23,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:23,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694921373] [2023-11-26 11:50:23,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:23,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:23,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:23,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:23,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:23,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-26 11:50:23,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:23,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:23,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-26 11:50:23,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:24,035 INFO L124 PetriNetUnfolderBase]: 1738/3382 cut-off events. [2023-11-26 11:50:24,035 INFO L125 PetriNetUnfolderBase]: For 1026/1068 co-relation queries the response was YES. [2023-11-26 11:50:24,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7505 conditions, 3382 events. 1738/3382 cut-off events. For 1026/1068 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 21633 event pairs, 849 based on Foata normal form. 82/3336 useless extension candidates. Maximal degree in co-relation 5351. Up to 2002 conditions per place. [2023-11-26 11:50:24,068 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 73 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-11-26 11:50:24,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 90 transitions, 443 flow [2023-11-26 11:50:24,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:50:24,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2023-11-26 11:50:24,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2023-11-26 11:50:24,072 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 134 transitions. [2023-11-26 11:50:24,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 134 transitions. [2023-11-26 11:50:24,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:24,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 134 transitions. [2023-11-26 11:50:24,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:24,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:24,077 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:24,077 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 154 flow. Second operand 4 states and 134 transitions. [2023-11-26 11:50:24,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 90 transitions, 443 flow [2023-11-26 11:50:24,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 90 transitions, 437 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:50:24,086 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 176 flow [2023-11-26 11:50:24,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2023-11-26 11:50:24,088 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 11 predicate places. [2023-11-26 11:50:24,088 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 176 flow [2023-11-26 11:50:24,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:24,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:24,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:24,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:50:24,089 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:24,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:24,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1065117114, now seen corresponding path program 1 times [2023-11-26 11:50:24,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:24,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395570981] [2023-11-26 11:50:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:24,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:24,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:24,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395570981] [2023-11-26 11:50:24,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395570981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:24,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:24,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:24,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503615311] [2023-11-26 11:50:24,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:24,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:24,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:24,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:24,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:24,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-26 11:50:24,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:24,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:24,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-26 11:50:24,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:24,724 INFO L124 PetriNetUnfolderBase]: 929/2071 cut-off events. [2023-11-26 11:50:24,724 INFO L125 PetriNetUnfolderBase]: For 1002/1098 co-relation queries the response was YES. [2023-11-26 11:50:24,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4891 conditions, 2071 events. 929/2071 cut-off events. For 1002/1098 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 12551 event pairs, 299 based on Foata normal form. 76/2097 useless extension candidates. Maximal degree in co-relation 3837. Up to 974 conditions per place. [2023-11-26 11:50:24,749 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 48 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2023-11-26 11:50:24,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 342 flow [2023-11-26 11:50:24,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:24,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:50:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2023-11-26 11:50:24,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-26 11:50:24,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 98 transitions. [2023-11-26 11:50:24,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 98 transitions. [2023-11-26 11:50:24,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:24,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 98 transitions. [2023-11-26 11:50:24,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:24,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:24,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:24,755 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 176 flow. Second operand 3 states and 98 transitions. [2023-11-26 11:50:24,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 342 flow [2023-11-26 11:50:24,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 68 transitions, 336 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 11:50:24,767 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 175 flow [2023-11-26 11:50:24,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2023-11-26 11:50:24,770 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 12 predicate places. [2023-11-26 11:50:24,770 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 175 flow [2023-11-26 11:50:24,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:24,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:24,771 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:24,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:50:24,772 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:24,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:24,772 INFO L85 PathProgramCache]: Analyzing trace with hash 28680515, now seen corresponding path program 1 times [2023-11-26 11:50:24,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:24,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729998402] [2023-11-26 11:50:24,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:24,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:24,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:24,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729998402] [2023-11-26 11:50:24,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729998402] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:24,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981402601] [2023-11-26 11:50:24,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:24,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:24,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:24,981 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:24,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:50:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:25,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:50:25,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:25,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:25,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981402601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:25,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:50:25,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-26 11:50:25,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802959224] [2023-11-26 11:50:25,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:25,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:50:25,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:25,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:50:25,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:50:25,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-26 11:50:25,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 175 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:25,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:25,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-26 11:50:25,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:25,857 INFO L124 PetriNetUnfolderBase]: 957/2066 cut-off events. [2023-11-26 11:50:25,857 INFO L125 PetriNetUnfolderBase]: For 1045/1153 co-relation queries the response was YES. [2023-11-26 11:50:25,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5108 conditions, 2066 events. 957/2066 cut-off events. For 1045/1153 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 11876 event pairs, 195 based on Foata normal form. 74/2083 useless extension candidates. Maximal degree in co-relation 2769. Up to 762 conditions per place. [2023-11-26 11:50:25,881 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 89 selfloop transitions, 9 changer transitions 0/111 dead transitions. [2023-11-26 11:50:25,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 111 transitions, 595 flow [2023-11-26 11:50:25,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:50:25,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:50:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2023-11-26 11:50:25,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5539358600583091 [2023-11-26 11:50:25,885 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 190 transitions. [2023-11-26 11:50:25,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 190 transitions. [2023-11-26 11:50:25,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:25,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 190 transitions. [2023-11-26 11:50:25,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 27.142857142857142) internal successors, (190), 7 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:25,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:25,890 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:25,890 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 175 flow. Second operand 7 states and 190 transitions. [2023-11-26 11:50:25,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 111 transitions, 595 flow [2023-11-26 11:50:25,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 111 transitions, 585 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:50:25,899 INFO L231 Difference]: Finished difference. Result has 67 places, 55 transitions, 231 flow [2023-11-26 11:50:25,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=231, PETRI_PLACES=67, PETRI_TRANSITIONS=55} [2023-11-26 11:50:25,903 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 20 predicate places. [2023-11-26 11:50:25,903 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 55 transitions, 231 flow [2023-11-26 11:50:25,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:25,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:25,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:25,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:26,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:26,114 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:26,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:26,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1316298551, now seen corresponding path program 1 times [2023-11-26 11:50:26,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:26,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295748918] [2023-11-26 11:50:26,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:26,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:26,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:26,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295748918] [2023-11-26 11:50:26,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295748918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:26,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:26,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:26,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087848051] [2023-11-26 11:50:26,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:26,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:26,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:26,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:26,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:26,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-26 11:50:26,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 55 transitions, 231 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:26,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:26,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-26 11:50:26,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:26,779 INFO L124 PetriNetUnfolderBase]: 1211/2691 cut-off events. [2023-11-26 11:50:26,779 INFO L125 PetriNetUnfolderBase]: For 2148/2268 co-relation queries the response was YES. [2023-11-26 11:50:26,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6944 conditions, 2691 events. 1211/2691 cut-off events. For 2148/2268 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 17244 event pairs, 667 based on Foata normal form. 28/2712 useless extension candidates. Maximal degree in co-relation 5411. Up to 1405 conditions per place. [2023-11-26 11:50:26,814 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 66 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2023-11-26 11:50:26,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 506 flow [2023-11-26 11:50:26,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:50:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2023-11-26 11:50:26,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2023-11-26 11:50:26,869 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 118 transitions. [2023-11-26 11:50:26,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 118 transitions. [2023-11-26 11:50:26,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:26,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 118 transitions. [2023-11-26 11:50:26,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:26,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:26,871 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:26,871 INFO L175 Difference]: Start difference. First operand has 67 places, 55 transitions, 231 flow. Second operand 4 states and 118 transitions. [2023-11-26 11:50:26,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 506 flow [2023-11-26 11:50:26,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 87 transitions, 498 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:26,882 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 273 flow [2023-11-26 11:50:26,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=273, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2023-11-26 11:50:26,883 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 22 predicate places. [2023-11-26 11:50:26,883 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 273 flow [2023-11-26 11:50:26,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:26,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:26,884 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:26,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:50:26,884 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:26,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:26,885 INFO L85 PathProgramCache]: Analyzing trace with hash 889096449, now seen corresponding path program 1 times [2023-11-26 11:50:26,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:26,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949901498] [2023-11-26 11:50:26,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:26,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:27,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:27,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949901498] [2023-11-26 11:50:27,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949901498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:27,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712880193] [2023-11-26 11:50:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:27,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:27,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:27,052 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:27,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:50:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:27,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:50:27,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:27,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:27,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712880193] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:27,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:27,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-26 11:50:27,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691802945] [2023-11-26 11:50:27,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:27,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:50:27,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:27,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:50:27,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:50:27,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-26 11:50:27,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 273 flow. Second operand has 12 states, 12 states have (on average 18.083333333333332) internal successors, (217), 12 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:27,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:27,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-26 11:50:27,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:28,990 INFO L124 PetriNetUnfolderBase]: 2649/5694 cut-off events. [2023-11-26 11:50:28,990 INFO L125 PetriNetUnfolderBase]: For 7475/7907 co-relation queries the response was YES. [2023-11-26 11:50:29,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15442 conditions, 5694 events. 2649/5694 cut-off events. For 7475/7907 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 37375 event pairs, 437 based on Foata normal form. 152/5839 useless extension candidates. Maximal degree in co-relation 8271. Up to 1223 conditions per place. [2023-11-26 11:50:29,050 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 196 selfloop transitions, 33 changer transitions 0/241 dead transitions. [2023-11-26 11:50:29,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 241 transitions, 1538 flow [2023-11-26 11:50:29,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:50:29,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-26 11:50:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 431 transitions. [2023-11-26 11:50:29,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5497448979591837 [2023-11-26 11:50:29,053 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 431 transitions. [2023-11-26 11:50:29,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 431 transitions. [2023-11-26 11:50:29,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:29,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 431 transitions. [2023-11-26 11:50:29,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 26.9375) internal successors, (431), 16 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:29,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 49.0) internal successors, (833), 17 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:29,058 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 49.0) internal successors, (833), 17 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:29,058 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 273 flow. Second operand 16 states and 431 transitions. [2023-11-26 11:50:29,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 241 transitions, 1538 flow [2023-11-26 11:50:29,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 241 transitions, 1526 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-26 11:50:29,076 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 600 flow [2023-11-26 11:50:29,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=600, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2023-11-26 11:50:29,077 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 41 predicate places. [2023-11-26 11:50:29,077 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 600 flow [2023-11-26 11:50:29,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.083333333333332) internal successors, (217), 12 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:29,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:29,077 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:29,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:29,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:29,284 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:29,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:29,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1656537458, now seen corresponding path program 1 times [2023-11-26 11:50:29,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:29,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023377678] [2023-11-26 11:50:29,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:29,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:29,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:29,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023377678] [2023-11-26 11:50:29,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023377678] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:29,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007539287] [2023-11-26 11:50:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:29,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:29,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:29,406 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:29,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:50:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:29,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:50:29,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:29,593 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:29,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007539287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:29,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:50:29,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-26 11:50:29,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630768702] [2023-11-26 11:50:29,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:29,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:50:29,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:29,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:50:29,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:50:29,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-26 11:50:29,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 600 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:29,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:29,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-26 11:50:29,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:30,788 INFO L124 PetriNetUnfolderBase]: 2830/6202 cut-off events. [2023-11-26 11:50:30,788 INFO L125 PetriNetUnfolderBase]: For 9886/10114 co-relation queries the response was YES. [2023-11-26 11:50:30,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17008 conditions, 6202 events. 2830/6202 cut-off events. For 9886/10114 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 42355 event pairs, 307 based on Foata normal form. 214/6201 useless extension candidates. Maximal degree in co-relation 14403. Up to 2177 conditions per place. [2023-11-26 11:50:30,845 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 199 selfloop transitions, 5 changer transitions 0/227 dead transitions. [2023-11-26 11:50:30,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 227 transitions, 2067 flow [2023-11-26 11:50:30,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:50:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:50:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2023-11-26 11:50:30,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2023-11-26 11:50:30,848 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 190 transitions. [2023-11-26 11:50:30,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 190 transitions. [2023-11-26 11:50:30,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:30,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 190 transitions. [2023-11-26 11:50:30,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.666666666666668) internal successors, (190), 6 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:30,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:30,851 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:30,851 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 600 flow. Second operand 6 states and 190 transitions. [2023-11-26 11:50:30,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 227 transitions, 2067 flow [2023-11-26 11:50:30,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 227 transitions, 1975 flow, removed 35 selfloop flow, removed 3 redundant places. [2023-11-26 11:50:30,961 INFO L231 Difference]: Finished difference. Result has 89 places, 86 transitions, 566 flow [2023-11-26 11:50:30,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=566, PETRI_PLACES=89, PETRI_TRANSITIONS=86} [2023-11-26 11:50:30,962 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 42 predicate places. [2023-11-26 11:50:30,962 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 86 transitions, 566 flow [2023-11-26 11:50:30,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:30,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:30,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:30,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:31,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:50:31,164 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:31,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:31,164 INFO L85 PathProgramCache]: Analyzing trace with hash 255743668, now seen corresponding path program 1 times [2023-11-26 11:50:31,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:31,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551119777] [2023-11-26 11:50:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:31,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:31,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:31,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551119777] [2023-11-26 11:50:31,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551119777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:31,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:31,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:50:31,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519028149] [2023-11-26 11:50:31,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:31,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:50:31,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:31,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:50:31,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:50:31,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-26 11:50:31,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 86 transitions, 566 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:31,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:31,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-26 11:50:31,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:32,446 INFO L124 PetriNetUnfolderBase]: 2921/6058 cut-off events. [2023-11-26 11:50:32,446 INFO L125 PetriNetUnfolderBase]: For 12148/12494 co-relation queries the response was YES. [2023-11-26 11:50:32,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18126 conditions, 6058 events. 2921/6058 cut-off events. For 12148/12494 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 39232 event pairs, 623 based on Foata normal form. 42/6095 useless extension candidates. Maximal degree in co-relation 15155. Up to 3577 conditions per place. [2023-11-26 11:50:32,499 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 122 selfloop transitions, 13 changer transitions 0/145 dead transitions. [2023-11-26 11:50:32,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 145 transitions, 1127 flow [2023-11-26 11:50:32,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:50:32,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:50:32,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2023-11-26 11:50:32,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2023-11-26 11:50:32,501 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 166 transitions. [2023-11-26 11:50:32,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 166 transitions. [2023-11-26 11:50:32,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:32,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 166 transitions. [2023-11-26 11:50:32,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:32,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:32,504 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:32,504 INFO L175 Difference]: Start difference. First operand has 89 places, 86 transitions, 566 flow. Second operand 6 states and 166 transitions. [2023-11-26 11:50:32,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 145 transitions, 1127 flow [2023-11-26 11:50:32,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 145 transitions, 1107 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:50:32,534 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 660 flow [2023-11-26 11:50:32,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=660, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2023-11-26 11:50:32,536 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 47 predicate places. [2023-11-26 11:50:32,536 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 660 flow [2023-11-26 11:50:32,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:32,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:32,537 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:32,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:50:32,537 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:32,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:32,538 INFO L85 PathProgramCache]: Analyzing trace with hash -186945845, now seen corresponding path program 1 times [2023-11-26 11:50:32,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:32,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747976033] [2023-11-26 11:50:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:32,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:50:32,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:32,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747976033] [2023-11-26 11:50:32,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747976033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:32,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:32,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:32,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758981085] [2023-11-26 11:50:32,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:32,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:32,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:32,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:32,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:32,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-26 11:50:32,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 660 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:32,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:32,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-26 11:50:32,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:33,883 INFO L124 PetriNetUnfolderBase]: 3195/6759 cut-off events. [2023-11-26 11:50:33,883 INFO L125 PetriNetUnfolderBase]: For 12884/13022 co-relation queries the response was YES. [2023-11-26 11:50:33,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19607 conditions, 6759 events. 3195/6759 cut-off events. For 12884/13022 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 45444 event pairs, 595 based on Foata normal form. 226/6984 useless extension candidates. Maximal degree in co-relation 16644. Up to 2854 conditions per place. [2023-11-26 11:50:33,950 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 146 selfloop transitions, 6 changer transitions 0/175 dead transitions. [2023-11-26 11:50:33,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 175 transitions, 1632 flow [2023-11-26 11:50:33,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:50:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2023-11-26 11:50:33,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2023-11-26 11:50:33,953 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 119 transitions. [2023-11-26 11:50:33,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 119 transitions. [2023-11-26 11:50:33,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:33,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 119 transitions. [2023-11-26 11:50:33,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:33,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:33,956 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:33,956 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 660 flow. Second operand 4 states and 119 transitions. [2023-11-26 11:50:33,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 175 transitions, 1632 flow [2023-11-26 11:50:34,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 175 transitions, 1618 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-26 11:50:34,014 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 668 flow [2023-11-26 11:50:34,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=668, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2023-11-26 11:50:34,017 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 47 predicate places. [2023-11-26 11:50:34,018 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 668 flow [2023-11-26 11:50:34,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:34,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:34,019 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:34,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:50:34,020 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:34,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:34,020 INFO L85 PathProgramCache]: Analyzing trace with hash 293678150, now seen corresponding path program 1 times [2023-11-26 11:50:34,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:34,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077330621] [2023-11-26 11:50:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:34,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:34,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:34,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077330621] [2023-11-26 11:50:34,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077330621] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:34,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817439289] [2023-11-26 11:50:34,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:34,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:34,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:34,173 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:34,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:50:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:34,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:50:34,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:34,391 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:34,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817439289] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:34,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:50:34,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-26 11:50:34,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040169902] [2023-11-26 11:50:34,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:34,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:50:34,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:34,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:50:34,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:50:34,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-26 11:50:34,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 668 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:34,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:34,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-26 11:50:34,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:35,687 INFO L124 PetriNetUnfolderBase]: 2914/6010 cut-off events. [2023-11-26 11:50:35,687 INFO L125 PetriNetUnfolderBase]: For 14228/14248 co-relation queries the response was YES. [2023-11-26 11:50:35,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18868 conditions, 6010 events. 2914/6010 cut-off events. For 14228/14248 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 39114 event pairs, 237 based on Foata normal form. 178/6008 useless extension candidates. Maximal degree in co-relation 18047. Up to 3601 conditions per place. [2023-11-26 11:50:35,731 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 131 selfloop transitions, 5 changer transitions 0/159 dead transitions. [2023-11-26 11:50:35,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 159 transitions, 1368 flow [2023-11-26 11:50:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:50:35,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:50:35,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2023-11-26 11:50:35,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2023-11-26 11:50:35,733 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 182 transitions. [2023-11-26 11:50:35,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 182 transitions. [2023-11-26 11:50:35,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:35,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 182 transitions. [2023-11-26 11:50:35,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:35,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:35,735 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:35,735 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 668 flow. Second operand 6 states and 182 transitions. [2023-11-26 11:50:35,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 159 transitions, 1368 flow [2023-11-26 11:50:35,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 159 transitions, 1332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:35,769 INFO L231 Difference]: Finished difference. Result has 96 places, 90 transitions, 666 flow [2023-11-26 11:50:35,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=666, PETRI_PLACES=96, PETRI_TRANSITIONS=90} [2023-11-26 11:50:35,770 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 49 predicate places. [2023-11-26 11:50:35,770 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 90 transitions, 666 flow [2023-11-26 11:50:35,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:35,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:35,771 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-26 11:50:35,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:35,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:50:35,981 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:35,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:35,981 INFO L85 PathProgramCache]: Analyzing trace with hash 514088547, now seen corresponding path program 1 times [2023-11-26 11:50:35,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:35,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912519443] [2023-11-26 11:50:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:35,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:50:36,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:36,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912519443] [2023-11-26 11:50:36,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912519443] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:36,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:36,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:36,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200432433] [2023-11-26 11:50:36,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:36,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:36,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:36,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:36,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:36,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-26 11:50:36,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 90 transitions, 666 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:36,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:36,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-26 11:50:36,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:36,996 INFO L124 PetriNetUnfolderBase]: 3039/6077 cut-off events. [2023-11-26 11:50:36,996 INFO L125 PetriNetUnfolderBase]: For 13431/13461 co-relation queries the response was YES. [2023-11-26 11:50:37,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19128 conditions, 6077 events. 3039/6077 cut-off events. For 13431/13461 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 38640 event pairs, 665 based on Foata normal form. 178/6252 useless extension candidates. Maximal degree in co-relation 16307. Up to 2981 conditions per place. [2023-11-26 11:50:37,042 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 108 selfloop transitions, 6 changer transitions 0/136 dead transitions. [2023-11-26 11:50:37,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 136 transitions, 1222 flow [2023-11-26 11:50:37,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:50:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2023-11-26 11:50:37,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5969387755102041 [2023-11-26 11:50:37,044 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 117 transitions. [2023-11-26 11:50:37,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 117 transitions. [2023-11-26 11:50:37,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:37,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 117 transitions. [2023-11-26 11:50:37,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:37,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:37,046 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:37,046 INFO L175 Difference]: Start difference. First operand has 96 places, 90 transitions, 666 flow. Second operand 4 states and 117 transitions. [2023-11-26 11:50:37,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 136 transitions, 1222 flow [2023-11-26 11:50:37,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 136 transitions, 1213 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-26 11:50:37,086 INFO L231 Difference]: Finished difference. Result has 95 places, 90 transitions, 673 flow [2023-11-26 11:50:37,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=673, PETRI_PLACES=95, PETRI_TRANSITIONS=90} [2023-11-26 11:50:37,087 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 48 predicate places. [2023-11-26 11:50:37,087 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 673 flow [2023-11-26 11:50:37,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:37,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:37,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:37,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:50:37,088 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:37,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:37,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1283490780, now seen corresponding path program 1 times [2023-11-26 11:50:37,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:37,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986145001] [2023-11-26 11:50:37,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:37,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:37,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:37,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986145001] [2023-11-26 11:50:37,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986145001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:37,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:37,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:50:37,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172732665] [2023-11-26 11:50:37,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:37,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:50:37,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:37,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:50:37,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:50:37,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-26 11:50:37,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 673 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:37,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:37,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-26 11:50:37,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:38,330 INFO L124 PetriNetUnfolderBase]: 2991/6041 cut-off events. [2023-11-26 11:50:38,330 INFO L125 PetriNetUnfolderBase]: For 15784/15784 co-relation queries the response was YES. [2023-11-26 11:50:38,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19685 conditions, 6041 events. 2991/6041 cut-off events. For 15784/15784 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 38617 event pairs, 479 based on Foata normal form. 108/6144 useless extension candidates. Maximal degree in co-relation 16556. Up to 3210 conditions per place. [2023-11-26 11:50:38,382 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 88 selfloop transitions, 35 changer transitions 0/132 dead transitions. [2023-11-26 11:50:38,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 132 transitions, 1123 flow [2023-11-26 11:50:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:50:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:50:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2023-11-26 11:50:38,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48104956268221577 [2023-11-26 11:50:38,385 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 165 transitions. [2023-11-26 11:50:38,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 165 transitions. [2023-11-26 11:50:38,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:38,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 165 transitions. [2023-11-26 11:50:38,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:38,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:38,388 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:38,388 INFO L175 Difference]: Start difference. First operand has 95 places, 90 transitions, 673 flow. Second operand 7 states and 165 transitions. [2023-11-26 11:50:38,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 132 transitions, 1123 flow [2023-11-26 11:50:38,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 132 transitions, 1099 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:38,435 INFO L231 Difference]: Finished difference. Result has 96 places, 86 transitions, 756 flow [2023-11-26 11:50:38,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=756, PETRI_PLACES=96, PETRI_TRANSITIONS=86} [2023-11-26 11:50:38,436 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 49 predicate places. [2023-11-26 11:50:38,437 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 86 transitions, 756 flow [2023-11-26 11:50:38,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:38,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:38,437 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:38,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:50:38,438 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:38,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:38,439 INFO L85 PathProgramCache]: Analyzing trace with hash -261064186, now seen corresponding path program 1 times [2023-11-26 11:50:38,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:38,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562218775] [2023-11-26 11:50:38,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:38,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:38,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:38,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562218775] [2023-11-26 11:50:38,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562218775] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:38,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230658983] [2023-11-26 11:50:38,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:38,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:38,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:38,636 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:38,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:50:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:38,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:50:38,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:38,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:38,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230658983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:38,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:50:38,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-11-26 11:50:38,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544708746] [2023-11-26 11:50:38,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:38,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:50:38,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:38,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:50:38,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:50:38,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-26 11:50:38,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 86 transitions, 756 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:38,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:38,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-26 11:50:38,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:40,089 INFO L124 PetriNetUnfolderBase]: 2947/6007 cut-off events. [2023-11-26 11:50:40,089 INFO L125 PetriNetUnfolderBase]: For 19163/19163 co-relation queries the response was YES. [2023-11-26 11:50:40,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20055 conditions, 6007 events. 2947/6007 cut-off events. For 19163/19163 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 38872 event pairs, 681 based on Foata normal form. 124/6126 useless extension candidates. Maximal degree in co-relation 17205. Up to 2982 conditions per place. [2023-11-26 11:50:40,139 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 87 selfloop transitions, 28 changer transitions 12/136 dead transitions. [2023-11-26 11:50:40,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 136 transitions, 1263 flow [2023-11-26 11:50:40,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:50:40,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:50:40,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2023-11-26 11:50:40,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4839650145772595 [2023-11-26 11:50:40,142 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 166 transitions. [2023-11-26 11:50:40,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 166 transitions. [2023-11-26 11:50:40,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:40,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 166 transitions. [2023-11-26 11:50:40,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:40,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:40,145 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:40,145 INFO L175 Difference]: Start difference. First operand has 96 places, 86 transitions, 756 flow. Second operand 7 states and 166 transitions. [2023-11-26 11:50:40,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 136 transitions, 1263 flow [2023-11-26 11:50:40,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 136 transitions, 1244 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:40,193 INFO L231 Difference]: Finished difference. Result has 101 places, 87 transitions, 876 flow [2023-11-26 11:50:40,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=876, PETRI_PLACES=101, PETRI_TRANSITIONS=87} [2023-11-26 11:50:40,194 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 54 predicate places. [2023-11-26 11:50:40,194 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 87 transitions, 876 flow [2023-11-26 11:50:40,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:40,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:40,195 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:40,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:40,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:40,401 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:40,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:40,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1185810915, now seen corresponding path program 2 times [2023-11-26 11:50:40,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:40,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107054115] [2023-11-26 11:50:40,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:40,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:50:40,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:40,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107054115] [2023-11-26 11:50:40,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107054115] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:40,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997402537] [2023-11-26 11:50:40,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:50:40,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:40,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:40,685 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:40,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:50:40,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:50:40,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:50:40,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:50:40,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 11:50:40,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 11:50:41,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997402537] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:41,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:41,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-11-26 11:50:41,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280677163] [2023-11-26 11:50:41,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:41,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:50:41,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:41,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:50:41,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:50:41,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-26 11:50:41,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 87 transitions, 876 flow. Second operand has 14 states, 14 states have (on average 17.142857142857142) internal successors, (240), 14 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:41,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:41,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-26 11:50:41,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:42,415 INFO L124 PetriNetUnfolderBase]: 3024/6198 cut-off events. [2023-11-26 11:50:42,415 INFO L125 PetriNetUnfolderBase]: For 25402/25402 co-relation queries the response was YES. [2023-11-26 11:50:42,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21456 conditions, 6198 events. 3024/6198 cut-off events. For 25402/25402 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 39272 event pairs, 483 based on Foata normal form. 68/6261 useless extension candidates. Maximal degree in co-relation 18986. Up to 1421 conditions per place. [2023-11-26 11:50:42,484 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 185 selfloop transitions, 52 changer transitions 0/246 dead transitions. [2023-11-26 11:50:42,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 246 transitions, 2291 flow [2023-11-26 11:50:42,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:50:42,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-26 11:50:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 359 transitions. [2023-11-26 11:50:42,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4884353741496599 [2023-11-26 11:50:42,487 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 359 transitions. [2023-11-26 11:50:42,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 359 transitions. [2023-11-26 11:50:42,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:42,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 359 transitions. [2023-11-26 11:50:42,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 23.933333333333334) internal successors, (359), 15 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:42,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 49.0) internal successors, (784), 16 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:42,492 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 49.0) internal successors, (784), 16 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:42,492 INFO L175 Difference]: Start difference. First operand has 101 places, 87 transitions, 876 flow. Second operand 15 states and 359 transitions. [2023-11-26 11:50:42,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 246 transitions, 2291 flow [2023-11-26 11:50:42,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 246 transitions, 2254 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-11-26 11:50:42,549 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 1342 flow [2023-11-26 11:50:42,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1342, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2023-11-26 11:50:42,550 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 69 predicate places. [2023-11-26 11:50:42,550 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 1342 flow [2023-11-26 11:50:42,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.142857142857142) internal successors, (240), 14 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:42,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:42,551 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-26 11:50:42,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-26 11:50:42,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:42,758 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:42,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:42,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1922043638, now seen corresponding path program 2 times [2023-11-26 11:50:42,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:42,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087641748] [2023-11-26 11:50:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:42,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:43,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:43,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087641748] [2023-11-26 11:50:43,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087641748] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:43,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156719785] [2023-11-26 11:50:43,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:50:43,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:43,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:43,064 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:43,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:50:43,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:50:43,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:50:43,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:50:43,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:43,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:43,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156719785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:43,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:43,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-26 11:50:43,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504521811] [2023-11-26 11:50:43,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:43,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 11:50:43,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:43,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 11:50:43,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:50:43,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-26 11:50:43,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 1342 flow. Second operand has 24 states, 24 states have (on average 18.541666666666668) internal successors, (445), 24 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:43,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:43,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-26 11:50:43,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:46,033 INFO L124 PetriNetUnfolderBase]: 5288/10870 cut-off events. [2023-11-26 11:50:46,033 INFO L125 PetriNetUnfolderBase]: For 56351/56351 co-relation queries the response was YES. [2023-11-26 11:50:46,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38284 conditions, 10870 events. 5288/10870 cut-off events. For 56351/56351 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 67744 event pairs, 1005 based on Foata normal form. 234/11099 useless extension candidates. Maximal degree in co-relation 30700. Up to 2603 conditions per place. [2023-11-26 11:50:46,130 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 357 selfloop transitions, 76 changer transitions 0/442 dead transitions. [2023-11-26 11:50:46,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 442 transitions, 4309 flow [2023-11-26 11:50:46,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 11:50:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-26 11:50:46,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 673 transitions. [2023-11-26 11:50:46,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722789115646258 [2023-11-26 11:50:46,135 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 673 transitions. [2023-11-26 11:50:46,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 673 transitions. [2023-11-26 11:50:46,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:46,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 673 transitions. [2023-11-26 11:50:46,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 28.041666666666668) internal successors, (673), 24 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:46,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 49.0) internal successors, (1225), 25 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:46,142 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 49.0) internal successors, (1225), 25 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:46,142 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 1342 flow. Second operand 24 states and 673 transitions. [2023-11-26 11:50:46,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 442 transitions, 4309 flow [2023-11-26 11:50:46,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 442 transitions, 4285 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:46,251 INFO L231 Difference]: Finished difference. Result has 143 places, 148 transitions, 2173 flow [2023-11-26 11:50:46,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2173, PETRI_PLACES=143, PETRI_TRANSITIONS=148} [2023-11-26 11:50:46,252 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 96 predicate places. [2023-11-26 11:50:46,252 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 148 transitions, 2173 flow [2023-11-26 11:50:46,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 18.541666666666668) internal successors, (445), 24 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:46,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:46,253 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:46,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:46,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 11:50:46,460 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:46,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:46,460 INFO L85 PathProgramCache]: Analyzing trace with hash 676157993, now seen corresponding path program 3 times [2023-11-26 11:50:46,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:46,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821407909] [2023-11-26 11:50:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:46,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 11:50:46,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:46,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821407909] [2023-11-26 11:50:46,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821407909] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:46,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105714187] [2023-11-26 11:50:46,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:50:46,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:46,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:46,856 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:46,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:50:47,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-26 11:50:47,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:50:47,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:50:47,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 11:50:47,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 11:50:47,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105714187] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:47,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:47,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-26 11:50:47,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979780513] [2023-11-26 11:50:47,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:47,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 11:50:47,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:47,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 11:50:47,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2023-11-26 11:50:47,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-26 11:50:47,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 148 transitions, 2173 flow. Second operand has 22 states, 22 states have (on average 17.09090909090909) internal successors, (376), 22 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:47,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:47,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-26 11:50:47,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:51,098 INFO L124 PetriNetUnfolderBase]: 7243/14769 cut-off events. [2023-11-26 11:50:51,098 INFO L125 PetriNetUnfolderBase]: For 91527/91527 co-relation queries the response was YES. [2023-11-26 11:50:51,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53857 conditions, 14769 events. 7243/14769 cut-off events. For 91527/91527 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 98182 event pairs, 767 based on Foata normal form. 108/14872 useless extension candidates. Maximal degree in co-relation 50966. Up to 2506 conditions per place. [2023-11-26 11:50:51,432 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 307 selfloop transitions, 141 changer transitions 0/457 dead transitions. [2023-11-26 11:50:51,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 457 transitions, 5178 flow [2023-11-26 11:50:51,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-26 11:50:51,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-26 11:50:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 621 transitions. [2023-11-26 11:50:51,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48744113029827313 [2023-11-26 11:50:51,439 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 621 transitions. [2023-11-26 11:50:51,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 621 transitions. [2023-11-26 11:50:51,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:51,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 621 transitions. [2023-11-26 11:50:51,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 23.884615384615383) internal successors, (621), 26 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:51,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 49.0) internal successors, (1323), 27 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:51,450 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 49.0) internal successors, (1323), 27 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:51,450 INFO L175 Difference]: Start difference. First operand has 143 places, 148 transitions, 2173 flow. Second operand 26 states and 621 transitions. [2023-11-26 11:50:51,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 457 transitions, 5178 flow [2023-11-26 11:50:51,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 457 transitions, 5058 flow, removed 45 selfloop flow, removed 7 redundant places. [2023-11-26 11:50:51,671 INFO L231 Difference]: Finished difference. Result has 171 places, 204 transitions, 3435 flow [2023-11-26 11:50:51,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2048, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3435, PETRI_PLACES=171, PETRI_TRANSITIONS=204} [2023-11-26 11:50:51,672 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 124 predicate places. [2023-11-26 11:50:51,673 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 204 transitions, 3435 flow [2023-11-26 11:50:51,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 17.09090909090909) internal successors, (376), 22 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:51,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:51,673 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:51,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:51,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 11:50:51,880 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:50:51,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:51,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2096798769, now seen corresponding path program 4 times [2023-11-26 11:50:51,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:51,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696456457] [2023-11-26 11:50:51,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:51,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 11:50:52,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:52,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696456457] [2023-11-26 11:50:52,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696456457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:52,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919174932] [2023-11-26 11:50:52,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:50:52,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:52,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:52,429 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:52,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:50:52,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:50:52,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:50:52,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:50:52,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 11:50:52,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 11:50:53,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919174932] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:53,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:53,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28 [2023-11-26 11:50:53,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407828082] [2023-11-26 11:50:53,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:53,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-26 11:50:53,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:53,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-26 11:50:53,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2023-11-26 11:50:53,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-26 11:50:53,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 204 transitions, 3435 flow. Second operand has 30 states, 30 states have (on average 17.066666666666666) internal successors, (512), 30 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:53,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:53,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-26 11:50:53,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:59,288 INFO L124 PetriNetUnfolderBase]: 10036/20416 cut-off events. [2023-11-26 11:50:59,288 INFO L125 PetriNetUnfolderBase]: For 159033/159033 co-relation queries the response was YES. [2023-11-26 11:50:59,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77053 conditions, 20416 events. 10036/20416 cut-off events. For 159033/159033 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 141842 event pairs, 971 based on Foata normal form. 218/20629 useless extension candidates. Maximal degree in co-relation 75656. Up to 3481 conditions per place. [2023-11-26 11:50:59,482 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 420 selfloop transitions, 222 changer transitions 0/651 dead transitions. [2023-11-26 11:50:59,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 651 transitions, 7846 flow [2023-11-26 11:50:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-26 11:50:59,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-26 11:50:59,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 882 transitions. [2023-11-26 11:50:59,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2023-11-26 11:50:59,487 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 882 transitions. [2023-11-26 11:50:59,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 882 transitions. [2023-11-26 11:50:59,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:59,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 882 transitions. [2023-11-26 11:50:59,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 23.83783783783784) internal successors, (882), 37 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:59,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 49.0) internal successors, (1862), 38 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:59,496 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 49.0) internal successors, (1862), 38 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:59,496 INFO L175 Difference]: Start difference. First operand has 171 places, 204 transitions, 3435 flow. Second operand 37 states and 882 transitions. [2023-11-26 11:50:59,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 651 transitions, 7846 flow [2023-11-26 11:51:00,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 651 transitions, 7536 flow, removed 84 selfloop flow, removed 7 redundant places. [2023-11-26 11:51:00,034 INFO L231 Difference]: Finished difference. Result has 209 places, 279 transitions, 5130 flow [2023-11-26 11:51:00,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3127, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=5130, PETRI_PLACES=209, PETRI_TRANSITIONS=279} [2023-11-26 11:51:00,035 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 162 predicate places. [2023-11-26 11:51:00,035 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 279 transitions, 5130 flow [2023-11-26 11:51:00,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 17.066666666666666) internal successors, (512), 30 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:00,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:00,036 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:00,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:00,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 11:51:00,236 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 11:51:00,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:00,237 INFO L85 PathProgramCache]: Analyzing trace with hash -202893923, now seen corresponding path program 5 times [2023-11-26 11:51:00,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:00,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277632945] [2023-11-26 11:51:00,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:00,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 11:51:01,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:01,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277632945] [2023-11-26 11:51:01,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277632945] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:01,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041983751] [2023-11-26 11:51:01,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:51:01,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:01,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:01,115 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:01,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398affd0-0219-4581-96fb-aefd0b7a320a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:51:01,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-26 11:51:01,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:01,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 11:51:01,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 11:51:01,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 11:51:02,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041983751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:02,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:02,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 36 [2023-11-26 11:51:02,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924860425] [2023-11-26 11:51:02,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:02,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-26 11:51:02,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:02,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-26 11:51:02,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1060, Unknown=0, NotChecked=0, Total=1406 [2023-11-26 11:51:02,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-26 11:51:02,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 279 transitions, 5130 flow. Second operand has 38 states, 38 states have (on average 17.05263157894737) internal successors, (648), 38 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:02,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:02,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-26 11:51:02,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand