./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/Ackermann04.c --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_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/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_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/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_60e4fd77-85ed-4309-92d1-e169bc58664d/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 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:04:54,074 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:04:54,207 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-26 12:04:54,218 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:04:54,219 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:04:54,260 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:04:54,261 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:04:54,262 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:04:54,263 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:04:54,268 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:04:54,269 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:04:54,270 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:04:54,271 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:04:54,273 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:04:54,273 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:04:54,274 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:04:54,274 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:04:54,275 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:04:54,275 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:04:54,276 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:04:54,276 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:04:54,277 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:04:54,277 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:04:54,278 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:04:54,278 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-26 12:04:54,279 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 12:04:54,279 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:04:54,279 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:04:54,280 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:04:54,281 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:04:54,282 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:04:54,283 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:04:54,283 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:04:54,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:04:54,283 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:04:54,284 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:04:54,284 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:04:54,284 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:04:54,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:04:54,285 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:04:54,285 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:04:54,285 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:04:54,286 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:04:54,286 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:04:54,286 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_60e4fd77-85ed-4309-92d1-e169bc58664d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 [2023-11-26 12:04:54,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:04:54,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:04:54,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:04:54,674 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:04:54,675 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:04:54,676 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/recursive/Ackermann04.c [2023-11-26 12:04:57,771 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:04:57,963 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:04:57,964 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/sv-benchmarks/c/recursive/Ackermann04.c [2023-11-26 12:04:57,972 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/data/c3acb3113/3ddb28ca8d644f8bb3c700bcd489674b/FLAG2d50fd9c4 [2023-11-26 12:04:57,992 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/data/c3acb3113/3ddb28ca8d644f8bb3c700bcd489674b [2023-11-26 12:04:57,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:04:58,001 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:04:58,004 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:04:58,005 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:04:58,011 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:04:58,012 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:57" (1/1) ... [2023-11-26 12:04:58,013 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b53a1c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:58, skipping insertion in model container [2023-11-26 12:04:58,014 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:57" (1/1) ... [2023-11-26 12:04:58,040 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:04:58,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:04:58,245 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:04:58,260 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:04:58,276 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:04:58,276 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:58 WrapperNode [2023-11-26 12:04:58,276 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:04:58,278 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:04:58,278 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:04:58,278 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:04:58,287 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:58" (1/1) ... [2023-11-26 12:04:58,293 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:58" (1/1) ... [2023-11-26 12:04:58,309 INFO L138 Inliner]: procedures = 13, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2023-11-26 12:04:58,309 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:04:58,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:04:58,310 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:04:58,310 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:04:58,319 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:58" (1/1) ... [2023-11-26 12:04:58,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:58" (1/1) ... [2023-11-26 12:04:58,320 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:58" (1/1) ... [2023-11-26 12:04:58,333 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 12:04:58,333 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:58" (1/1) ... [2023-11-26 12:04:58,334 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:58" (1/1) ... [2023-11-26 12:04:58,337 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:58" (1/1) ... [2023-11-26 12:04:58,339 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:58" (1/1) ... [2023-11-26 12:04:58,340 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:58" (1/1) ... [2023-11-26 12:04:58,341 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:58" (1/1) ... [2023-11-26 12:04:58,343 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:04:58,344 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:04:58,344 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:04:58,344 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:04:58,345 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:58" (1/1) ... [2023-11-26 12:04:58,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:04:58,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:58,383 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:58,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:04:58,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:04:58,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:04:58,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:04:58,423 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-11-26 12:04:58,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-11-26 12:04:58,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:04:58,488 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:04:58,490 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:04:58,657 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:04:58,683 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:04:58,684 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 12:04:58,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:58 BoogieIcfgContainer [2023-11-26 12:04:58,684 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:04:58,687 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:04:58,688 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:04:58,691 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:04:58,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:04:57" (1/3) ... [2023-11-26 12:04:58,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@803f80c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:04:58, skipping insertion in model container [2023-11-26 12:04:58,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:58" (2/3) ... [2023-11-26 12:04:58,694 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@803f80c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:04:58, skipping insertion in model container [2023-11-26 12:04:58,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:58" (3/3) ... [2023-11-26 12:04:58,695 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2023-11-26 12:04:58,733 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:04:58,733 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-26 12:04:58,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:04:58,784 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;@64006499, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:04:58,784 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-26 12:04:58,789 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 21 states have (on average 1.619047619047619) internal successors, (34), 29 states have internal predecessors, (34), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 12:04:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 12:04:58,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:04:58,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:58,797 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:04:58,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:58,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2118177911, now seen corresponding path program 1 times [2023-11-26 12:04:58,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:58,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747882088] [2023-11-26 12:04:58,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:58,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:59,133 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 12:04:59,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:59,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747882088] [2023-11-26 12:04:59,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747882088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:59,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:59,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:04:59,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138187594] [2023-11-26 12:04:59,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:59,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:04:59,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:59,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:04:59,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:04:59,206 INFO L87 Difference]: Start difference. First operand has 35 states, 21 states have (on average 1.619047619047619) internal successors, (34), 29 states have internal predecessors, (34), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:59,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:04:59,441 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2023-11-26 12:04:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:04:59,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-26 12:04:59,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:04:59,454 INFO L225 Difference]: With dead ends: 67 [2023-11-26 12:04:59,455 INFO L226 Difference]: Without dead ends: 58 [2023-11-26 12:04:59,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:04:59,464 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 52 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:04:59,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 102 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:04:59,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-26 12:04:59,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2023-11-26 12:04:59,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 41 states have internal predecessors, (51), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 12:04:59,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2023-11-26 12:04:59,512 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 7 [2023-11-26 12:04:59,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:04:59,512 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2023-11-26 12:04:59,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:59,513 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2023-11-26 12:04:59,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-26 12:04:59,514 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:04:59,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:59,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:04:59,514 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:04:59,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:59,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1239000740, now seen corresponding path program 1 times [2023-11-26 12:04:59,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:59,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769387571] [2023-11-26 12:04:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:59,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:59,593 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 12:04:59,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:59,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769387571] [2023-11-26 12:04:59,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769387571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:59,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:59,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:04:59,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130260423] [2023-11-26 12:04:59,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:59,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:04:59,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:59,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:04:59,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:04:59,597 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:59,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:04:59,684 INFO L93 Difference]: Finished difference Result 100 states and 136 transitions. [2023-11-26 12:04:59,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:04:59,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-26 12:04:59,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:04:59,688 INFO L225 Difference]: With dead ends: 100 [2023-11-26 12:04:59,688 INFO L226 Difference]: Without dead ends: 94 [2023-11-26 12:04:59,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:04:59,690 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 48 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:04:59,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 98 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:04:59,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-26 12:04:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2023-11-26 12:04:59,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 60 states have (on average 1.5166666666666666) internal successors, (91), 69 states have internal predecessors, (91), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-26 12:04:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 114 transitions. [2023-11-26 12:04:59,730 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 114 transitions. Word has length 8 [2023-11-26 12:04:59,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:04:59,731 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 114 transitions. [2023-11-26 12:04:59,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 114 transitions. [2023-11-26 12:04:59,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-26 12:04:59,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:04:59,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:59,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 12:04:59,733 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:04:59,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:59,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1239005737, now seen corresponding path program 1 times [2023-11-26 12:04:59,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:59,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386210112] [2023-11-26 12:04:59,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:59,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:59,869 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 12:04:59,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:59,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386210112] [2023-11-26 12:04:59,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386210112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:59,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:59,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:04:59,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421963281] [2023-11-26 12:04:59,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:59,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:04:59,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:59,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:04:59,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:04:59,873 INFO L87 Difference]: Start difference. First operand 84 states and 114 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:04:59,997 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2023-11-26 12:04:59,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:04:59,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-26 12:04:59,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:00,001 INFO L225 Difference]: With dead ends: 113 [2023-11-26 12:05:00,001 INFO L226 Difference]: Without dead ends: 109 [2023-11-26 12:05:00,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:05:00,004 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 49 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:00,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 86 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:05:00,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-26 12:05:00,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2023-11-26 12:05:00,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 73 states have (on average 1.452054794520548) internal successors, (106), 82 states have internal predecessors, (106), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-26 12:05:00,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2023-11-26 12:05:00,028 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 8 [2023-11-26 12:05:00,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:00,029 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2023-11-26 12:05:00,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:00,029 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2023-11-26 12:05:00,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-26 12:05:00,030 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:00,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:00,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 12:05:00,031 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:00,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:00,031 INFO L85 PathProgramCache]: Analyzing trace with hash 245682796, now seen corresponding path program 1 times [2023-11-26 12:05:00,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:00,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732915154] [2023-11-26 12:05:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:00,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:00,135 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 12:05:00,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:00,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732915154] [2023-11-26 12:05:00,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732915154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:00,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:00,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:05:00,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126238727] [2023-11-26 12:05:00,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:00,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:05:00,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:00,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:05:00,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:05:00,144 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:00,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:00,220 INFO L93 Difference]: Finished difference Result 101 states and 135 transitions. [2023-11-26 12:05:00,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:05:00,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-26 12:05:00,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:00,223 INFO L225 Difference]: With dead ends: 101 [2023-11-26 12:05:00,223 INFO L226 Difference]: Without dead ends: 99 [2023-11-26 12:05:00,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:05:00,226 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:00,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:05:00,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-26 12:05:00,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-11-26 12:05:00,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 80 states have internal predecessors, (96), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-26 12:05:00,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2023-11-26 12:05:00,254 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 9 [2023-11-26 12:05:00,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:00,254 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2023-11-26 12:05:00,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:00,255 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2023-11-26 12:05:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-26 12:05:00,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:00,256 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:00,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 12:05:00,256 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:00,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:00,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1896410727, now seen corresponding path program 1 times [2023-11-26 12:05:00,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:00,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030819333] [2023-11-26 12:05:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:00,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:00,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:00,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030819333] [2023-11-26 12:05:00,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030819333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:00,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:00,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:05:00,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024896908] [2023-11-26 12:05:00,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:00,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:05:00,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:00,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:05:00,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:05:00,391 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:00,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:00,499 INFO L93 Difference]: Finished difference Result 167 states and 220 transitions. [2023-11-26 12:05:00,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:05:00,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-26 12:05:00,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:00,504 INFO L225 Difference]: With dead ends: 167 [2023-11-26 12:05:00,505 INFO L226 Difference]: Without dead ends: 96 [2023-11-26 12:05:00,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:05:00,511 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 26 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:00,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 82 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:05:00,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-26 12:05:00,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2023-11-26 12:05:00,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 70 states have (on average 1.3) internal successors, (91), 77 states have internal predecessors, (91), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-26 12:05:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2023-11-26 12:05:00,531 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 14 [2023-11-26 12:05:00,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:00,532 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2023-11-26 12:05:00,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:00,532 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2023-11-26 12:05:00,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-26 12:05:00,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:00,533 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:00,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 12:05:00,534 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:00,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:00,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1896410503, now seen corresponding path program 1 times [2023-11-26 12:05:00,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:00,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405054639] [2023-11-26 12:05:00,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:00,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:00,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:00,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405054639] [2023-11-26 12:05:00,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405054639] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:00,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621568650] [2023-11-26 12:05:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:00,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:00,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:00,694 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:00,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:05:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:00,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:05:00,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:00,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:00,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621568650] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:00,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:00,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-26 12:05:00,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827142486] [2023-11-26 12:05:00,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:00,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 12:05:00,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:00,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 12:05:00,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:05:00,920 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:01,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:01,299 INFO L93 Difference]: Finished difference Result 273 states and 355 transitions. [2023-11-26 12:05:01,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 12:05:01,300 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-26 12:05:01,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:01,304 INFO L225 Difference]: With dead ends: 273 [2023-11-26 12:05:01,304 INFO L226 Difference]: Without dead ends: 271 [2023-11-26 12:05:01,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-11-26 12:05:01,307 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 304 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:01,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 172 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:05:01,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-11-26 12:05:01,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 235. [2023-11-26 12:05:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 181 states have (on average 1.2651933701657458) internal successors, (229), 188 states have internal predecessors, (229), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-26 12:05:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 298 transitions. [2023-11-26 12:05:01,351 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 298 transitions. Word has length 14 [2023-11-26 12:05:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:01,352 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 298 transitions. [2023-11-26 12:05:01,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 298 transitions. [2023-11-26 12:05:01,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 12:05:01,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:01,353 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:01,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:01,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:01,565 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:01,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:01,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1750564749, now seen corresponding path program 1 times [2023-11-26 12:05:01,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:01,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633793216] [2023-11-26 12:05:01,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:01,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:01,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:01,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633793216] [2023-11-26 12:05:01,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633793216] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:01,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495067318] [2023-11-26 12:05:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:01,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:01,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:01,644 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:01,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:05:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:01,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 12:05:01,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:01,758 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:05:01,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495067318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:01,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:05:01,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-11-26 12:05:01,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926242371] [2023-11-26 12:05:01,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:01,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:05:01,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:01,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:05:01,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-26 12:05:01,764 INFO L87 Difference]: Start difference. First operand 235 states and 298 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:01,924 INFO L93 Difference]: Finished difference Result 327 states and 436 transitions. [2023-11-26 12:05:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:05:01,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-26 12:05:01,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:01,933 INFO L225 Difference]: With dead ends: 327 [2023-11-26 12:05:01,933 INFO L226 Difference]: Without dead ends: 326 [2023-11-26 12:05:01,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:05:01,937 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 51 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:01,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 79 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:05:01,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-11-26 12:05:02,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 292. [2023-11-26 12:05:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 226 states have (on average 1.261061946902655) internal successors, (285), 233 states have internal predecessors, (285), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-26 12:05:02,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 372 transitions. [2023-11-26 12:05:02,008 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 372 transitions. Word has length 15 [2023-11-26 12:05:02,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:02,008 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 372 transitions. [2023-11-26 12:05:02,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:02,009 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 372 transitions. [2023-11-26 12:05:02,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 12:05:02,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:02,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:02,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:02,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:02,217 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:02,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:02,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1576448012, now seen corresponding path program 1 times [2023-11-26 12:05:02,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:02,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395171915] [2023-11-26 12:05:02,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:02,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:02,314 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 12:05:02,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:02,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395171915] [2023-11-26 12:05:02,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395171915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:02,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861299002] [2023-11-26 12:05:02,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:02,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:02,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:02,323 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:02,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:05:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:02,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:05:02,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:02,427 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 12:05:02,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:02,518 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 12:05:02,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861299002] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:02,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:02,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-26 12:05:02,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754491745] [2023-11-26 12:05:02,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:02,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 12:05:02,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:02,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 12:05:02,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:05:02,523 INFO L87 Difference]: Start difference. First operand 292 states and 372 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:02,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:02,837 INFO L93 Difference]: Finished difference Result 590 states and 791 transitions. [2023-11-26 12:05:02,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 12:05:02,838 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-26 12:05:02,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:02,847 INFO L225 Difference]: With dead ends: 590 [2023-11-26 12:05:02,847 INFO L226 Difference]: Without dead ends: 589 [2023-11-26 12:05:02,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-11-26 12:05:02,849 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 150 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:02,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 189 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:05:02,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2023-11-26 12:05:02,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 520. [2023-11-26 12:05:02,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 406 states have (on average 1.2044334975369457) internal successors, (489), 413 states have internal predecessors, (489), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-26 12:05:02,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 648 transitions. [2023-11-26 12:05:02,920 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 648 transitions. Word has length 18 [2023-11-26 12:05:02,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:02,921 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 648 transitions. [2023-11-26 12:05:02,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:02,921 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 648 transitions. [2023-11-26 12:05:02,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 12:05:02,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:02,923 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:02,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:03,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 12:05:03,130 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:03,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:03,130 INFO L85 PathProgramCache]: Analyzing trace with hash 244799614, now seen corresponding path program 1 times [2023-11-26 12:05:03,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:03,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601007170] [2023-11-26 12:05:03,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:03,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:03,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 12:05:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 12:05:03,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:03,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601007170] [2023-11-26 12:05:03,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601007170] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:03,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075433594] [2023-11-26 12:05:03,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:03,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:03,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:03,266 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:03,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:05:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:03,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 12:05:03,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 12:05:03,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:05:03,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075433594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:03,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:05:03,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2023-11-26 12:05:03,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885715713] [2023-11-26 12:05:03,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:03,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:05:03,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:03,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:05:03,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-11-26 12:05:03,394 INFO L87 Difference]: Start difference. First operand 520 states and 648 transitions. Second operand has 5 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:05:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:03,553 INFO L93 Difference]: Finished difference Result 561 states and 695 transitions. [2023-11-26 12:05:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:05:03,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-26 12:05:03,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:03,558 INFO L225 Difference]: With dead ends: 561 [2023-11-26 12:05:03,558 INFO L226 Difference]: Without dead ends: 560 [2023-11-26 12:05:03,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:05:03,559 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 43 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:03,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 97 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:05:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2023-11-26 12:05:03,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 519. [2023-11-26 12:05:03,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 406 states have (on average 1.1945812807881773) internal successors, (485), 412 states have internal predecessors, (485), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-26 12:05:03,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 644 transitions. [2023-11-26 12:05:03,628 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 644 transitions. Word has length 23 [2023-11-26 12:05:03,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:03,628 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 644 transitions. [2023-11-26 12:05:03,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:05:03,628 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 644 transitions. [2023-11-26 12:05:03,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-26 12:05:03,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:03,630 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:03,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:03,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:03,837 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:03,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:03,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1001146494, now seen corresponding path program 1 times [2023-11-26 12:05:03,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:03,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757663712] [2023-11-26 12:05:03,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:03,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:03,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 12:05:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 12:05:03,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:03,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757663712] [2023-11-26 12:05:03,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757663712] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:03,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951715098] [2023-11-26 12:05:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:03,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:03,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:03,987 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:04,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:05:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:04,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 12:05:04,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 12:05:04,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 12:05:04,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951715098] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:04,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:04,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-26 12:05:04,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151085359] [2023-11-26 12:05:04,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:04,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 12:05:04,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:04,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 12:05:04,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-26 12:05:04,306 INFO L87 Difference]: Start difference. First operand 519 states and 644 transitions. Second operand has 15 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 13 states have internal predecessors, (40), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:05:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:04,695 INFO L93 Difference]: Finished difference Result 868 states and 1248 transitions. [2023-11-26 12:05:04,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 12:05:04,696 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 13 states have internal predecessors, (40), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-11-26 12:05:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:04,705 INFO L225 Difference]: With dead ends: 868 [2023-11-26 12:05:04,706 INFO L226 Difference]: Without dead ends: 866 [2023-11-26 12:05:04,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2023-11-26 12:05:04,708 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 140 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:04,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 107 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:05:04,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2023-11-26 12:05:04,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 726. [2023-11-26 12:05:04,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 541 states have (on average 1.1866913123844731) internal successors, (642), 570 states have internal predecessors, (642), 123 states have call successors, (123), 35 states have call predecessors, (123), 57 states have return successors, (215), 120 states have call predecessors, (215), 119 states have call successors, (215) [2023-11-26 12:05:04,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 980 transitions. [2023-11-26 12:05:04,825 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 980 transitions. Word has length 24 [2023-11-26 12:05:04,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:04,828 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 980 transitions. [2023-11-26 12:05:04,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 13 states have internal predecessors, (40), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:05:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 980 transitions. [2023-11-26 12:05:04,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 12:05:04,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:04,833 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:04,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:05,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:05,044 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:05,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:05,045 INFO L85 PathProgramCache]: Analyzing trace with hash -24086519, now seen corresponding path program 1 times [2023-11-26 12:05:05,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:05,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534900496] [2023-11-26 12:05:05,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:05,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:05,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 12:05:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 12:05:05,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:05,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534900496] [2023-11-26 12:05:05,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534900496] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:05,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940276260] [2023-11-26 12:05:05,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:05,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:05,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:05,172 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:05,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:05:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:05,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 12:05:05,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:05:05,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:05:05,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940276260] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:05,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:05:05,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-11-26 12:05:05,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713697096] [2023-11-26 12:05:05,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:05,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:05:05,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:05,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:05:05,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:05:05,434 INFO L87 Difference]: Start difference. First operand 726 states and 980 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:05:05,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:05,728 INFO L93 Difference]: Finished difference Result 885 states and 1250 transitions. [2023-11-26 12:05:05,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 12:05:05,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-11-26 12:05:05,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:05,736 INFO L225 Difference]: With dead ends: 885 [2023-11-26 12:05:05,736 INFO L226 Difference]: Without dead ends: 884 [2023-11-26 12:05:05,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-11-26 12:05:05,738 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 51 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:05,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 99 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:05:05,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2023-11-26 12:05:05,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 811. [2023-11-26 12:05:05,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 601 states have (on average 1.1846921797004992) internal successors, (712), 632 states have internal predecessors, (712), 143 states have call successors, (143), 38 states have call predecessors, (143), 62 states have return successors, (220), 140 states have call predecessors, (220), 139 states have call successors, (220) [2023-11-26 12:05:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1075 transitions. [2023-11-26 12:05:05,849 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1075 transitions. Word has length 26 [2023-11-26 12:05:05,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:05,849 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 1075 transitions. [2023-11-26 12:05:05,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:05:05,849 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1075 transitions. [2023-11-26 12:05:05,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 12:05:05,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:05,851 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-26 12:05:05,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:06,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:06,058 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:06,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:06,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1210732047, now seen corresponding path program 1 times [2023-11-26 12:05:06,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:06,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031034485] [2023-11-26 12:05:06,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:06,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:06,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 12:05:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:06,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 12:05:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:05:06,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:06,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031034485] [2023-11-26 12:05:06,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031034485] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:06,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815930363] [2023-11-26 12:05:06,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:06,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:06,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:06,242 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:06,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:05:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:06,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 12:05:06,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:05:06,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:05:06,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815930363] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:06,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:06,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-26 12:05:06,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756030686] [2023-11-26 12:05:06,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:06,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 12:05:06,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:06,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 12:05:06,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-11-26 12:05:06,636 INFO L87 Difference]: Start difference. First operand 811 states and 1075 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-26 12:05:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:07,350 INFO L93 Difference]: Finished difference Result 1502 states and 2505 transitions. [2023-11-26 12:05:07,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 12:05:07,351 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2023-11-26 12:05:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:07,366 INFO L225 Difference]: With dead ends: 1502 [2023-11-26 12:05:07,367 INFO L226 Difference]: Without dead ends: 1500 [2023-11-26 12:05:07,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2023-11-26 12:05:07,370 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 106 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:07,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 207 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 12:05:07,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2023-11-26 12:05:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1257. [2023-11-26 12:05:07,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 901 states have (on average 1.169811320754717) internal successors, (1054), 946 states have internal predecessors, (1054), 241 states have call successors, (241), 53 states have call predecessors, (241), 110 states have return successors, (548), 257 states have call predecessors, (548), 236 states have call successors, (548) [2023-11-26 12:05:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1843 transitions. [2023-11-26 12:05:07,617 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1843 transitions. Word has length 33 [2023-11-26 12:05:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:07,617 INFO L495 AbstractCegarLoop]: Abstraction has 1257 states and 1843 transitions. [2023-11-26 12:05:07,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-26 12:05:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1843 transitions. [2023-11-26 12:05:07,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 12:05:07,620 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:07,620 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:07,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:07,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:07,827 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:07,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:07,827 INFO L85 PathProgramCache]: Analyzing trace with hash 60876767, now seen corresponding path program 2 times [2023-11-26 12:05:07,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:07,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453234432] [2023-11-26 12:05:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:07,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:07,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 12:05:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 12:05:07,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:07,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453234432] [2023-11-26 12:05:07,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453234432] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:07,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031396869] [2023-11-26 12:05:07,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:05:07,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:07,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:07,999 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:08,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 12:05:08,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:05:08,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:05:08,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 12:05:08,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 12:05:08,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 12:05:08,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031396869] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:08,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:08,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-26 12:05:08,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733911867] [2023-11-26 12:05:08,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:08,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 12:05:08,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:08,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 12:05:08,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-11-26 12:05:08,329 INFO L87 Difference]: Start difference. First operand 1257 states and 1843 transitions. Second operand has 19 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:05:09,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:09,053 INFO L93 Difference]: Finished difference Result 2349 states and 3815 transitions. [2023-11-26 12:05:09,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-26 12:05:09,053 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2023-11-26 12:05:09,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:09,081 INFO L225 Difference]: With dead ends: 2349 [2023-11-26 12:05:09,081 INFO L226 Difference]: Without dead ends: 2332 [2023-11-26 12:05:09,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2023-11-26 12:05:09,086 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 329 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:09,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 159 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:05:09,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2023-11-26 12:05:09,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1747. [2023-11-26 12:05:09,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1274 states have (on average 1.1656200941915227) internal successors, (1485), 1332 states have internal predecessors, (1485), 308 states have call successors, (308), 82 states have call predecessors, (308), 160 states have return successors, (829), 332 states have call predecessors, (829), 300 states have call successors, (829) [2023-11-26 12:05:09,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 2622 transitions. [2023-11-26 12:05:09,364 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 2622 transitions. Word has length 34 [2023-11-26 12:05:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:09,365 INFO L495 AbstractCegarLoop]: Abstraction has 1747 states and 2622 transitions. [2023-11-26 12:05:09,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:05:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 2622 transitions. [2023-11-26 12:05:09,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-26 12:05:09,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:09,367 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:09,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:09,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:09,573 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:09,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:09,574 INFO L85 PathProgramCache]: Analyzing trace with hash 427659960, now seen corresponding path program 1 times [2023-11-26 12:05:09,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:09,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633014981] [2023-11-26 12:05:09,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:09,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:09,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 12:05:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:09,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 12:05:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:05:09,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:09,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633014981] [2023-11-26 12:05:09,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633014981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:09,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204988197] [2023-11-26 12:05:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:09,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:09,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:09,746 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:09,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 12:05:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:09,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 12:05:09,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:05:09,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:05:10,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204988197] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:10,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:05:10,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2023-11-26 12:05:10,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204886787] [2023-11-26 12:05:10,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:10,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 12:05:10,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:10,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 12:05:10,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-11-26 12:05:10,151 INFO L87 Difference]: Start difference. First operand 1747 states and 2622 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 12:05:10,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:10,597 INFO L93 Difference]: Finished difference Result 1904 states and 3108 transitions. [2023-11-26 12:05:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:05:10,598 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2023-11-26 12:05:10,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:10,619 INFO L225 Difference]: With dead ends: 1904 [2023-11-26 12:05:10,620 INFO L226 Difference]: Without dead ends: 1903 [2023-11-26 12:05:10,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-11-26 12:05:10,623 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 47 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:10,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 160 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:05:10,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2023-11-26 12:05:10,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1728. [2023-11-26 12:05:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1265 states have (on average 1.1644268774703557) internal successors, (1473), 1323 states have internal predecessors, (1473), 305 states have call successors, (305), 82 states have call predecessors, (305), 153 states have return successors, (696), 322 states have call predecessors, (696), 297 states have call successors, (696) [2023-11-26 12:05:10,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2474 transitions. [2023-11-26 12:05:10,875 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2474 transitions. Word has length 35 [2023-11-26 12:05:10,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:10,875 INFO L495 AbstractCegarLoop]: Abstraction has 1728 states and 2474 transitions. [2023-11-26 12:05:10,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 12:05:10,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2474 transitions. [2023-11-26 12:05:10,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-26 12:05:10,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:10,879 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-26 12:05:10,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:11,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 12:05:11,086 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:11,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:11,087 INFO L85 PathProgramCache]: Analyzing trace with hash 886287478, now seen corresponding path program 2 times [2023-11-26 12:05:11,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:11,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575191340] [2023-11-26 12:05:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:11,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:11,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:11,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575191340] [2023-11-26 12:05:11,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575191340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:11,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611941950] [2023-11-26 12:05:11,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:05:11,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:11,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:11,250 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:11,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 12:05:11,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:05:11,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:05:11,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 12:05:11,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:11,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:11,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611941950] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:11,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:11,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-11-26 12:05:11,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158982239] [2023-11-26 12:05:11,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:11,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 12:05:11,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:11,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 12:05:11,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-11-26 12:05:11,598 INFO L87 Difference]: Start difference. First operand 1728 states and 2474 transitions. Second operand has 24 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:12,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:12,552 INFO L93 Difference]: Finished difference Result 2552 states and 3968 transitions. [2023-11-26 12:05:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-26 12:05:12,553 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-26 12:05:12,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:12,575 INFO L225 Difference]: With dead ends: 2552 [2023-11-26 12:05:12,575 INFO L226 Difference]: Without dead ends: 2551 [2023-11-26 12:05:12,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-11-26 12:05:12,581 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 416 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:12,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 392 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:05:12,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2023-11-26 12:05:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2410. [2023-11-26 12:05:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2410 states, 1750 states have (on average 1.1462857142857144) internal successors, (2006), 1837 states have internal predecessors, (2006), 425 states have call successors, (425), 106 states have call predecessors, (425), 230 states have return successors, (994), 466 states have call predecessors, (994), 417 states have call successors, (994) [2023-11-26 12:05:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 3425 transitions. [2023-11-26 12:05:12,911 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 3425 transitions. Word has length 42 [2023-11-26 12:05:12,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:12,912 INFO L495 AbstractCegarLoop]: Abstraction has 2410 states and 3425 transitions. [2023-11-26 12:05:12,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:12,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 3425 transitions. [2023-11-26 12:05:12,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-26 12:05:12,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:12,915 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:12,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:13,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 12:05:13,121 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:13,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:13,122 INFO L85 PathProgramCache]: Analyzing trace with hash 798745486, now seen corresponding path program 2 times [2023-11-26 12:05:13,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:13,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712913008] [2023-11-26 12:05:13,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:13,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:13,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 12:05:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:13,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 12:05:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:05:13,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:13,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712913008] [2023-11-26 12:05:13,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712913008] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:13,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238222646] [2023-11-26 12:05:13,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:05:13,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:13,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:13,333 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:13,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 12:05:13,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:05:13,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:05:13,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 12:05:13,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:05:13,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:05:13,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238222646] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:13,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:13,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-11-26 12:05:13,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449716562] [2023-11-26 12:05:13,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:13,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 12:05:13,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:13,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 12:05:13,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-11-26 12:05:13,792 INFO L87 Difference]: Start difference. First operand 2410 states and 3425 transitions. Second operand has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-26 12:05:15,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:15,338 INFO L93 Difference]: Finished difference Result 5114 states and 8897 transitions. [2023-11-26 12:05:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-26 12:05:15,339 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2023-11-26 12:05:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:15,373 INFO L225 Difference]: With dead ends: 5114 [2023-11-26 12:05:15,374 INFO L226 Difference]: Without dead ends: 3630 [2023-11-26 12:05:15,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=586, Invalid=1964, Unknown=0, NotChecked=0, Total=2550 [2023-11-26 12:05:15,397 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 272 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:15,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 253 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:05:15,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2023-11-26 12:05:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 2792. [2023-11-26 12:05:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2028 states have (on average 1.1420118343195267) internal successors, (2316), 2126 states have internal predecessors, (2316), 496 states have call successors, (496), 126 states have call predecessors, (496), 263 states have return successors, (1090), 539 states have call predecessors, (1090), 488 states have call successors, (1090) [2023-11-26 12:05:15,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 3902 transitions. [2023-11-26 12:05:15,885 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 3902 transitions. Word has length 43 [2023-11-26 12:05:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:15,886 INFO L495 AbstractCegarLoop]: Abstraction has 2792 states and 3902 transitions. [2023-11-26 12:05:15,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-26 12:05:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 3902 transitions. [2023-11-26 12:05:15,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-26 12:05:15,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:15,889 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:15,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:16,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 12:05:16,095 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:16,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:16,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1386196276, now seen corresponding path program 1 times [2023-11-26 12:05:16,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:16,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550394015] [2023-11-26 12:05:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:16,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:16,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 12:05:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:16,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:05:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:16,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 12:05:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 12:05:16,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:16,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550394015] [2023-11-26 12:05:16,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550394015] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:16,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230264110] [2023-11-26 12:05:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:16,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:16,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:16,182 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:16,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 12:05:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:16,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:05:16,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 12:05:16,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 12:05:16,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230264110] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:16,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:16,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2023-11-26 12:05:16,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128371812] [2023-11-26 12:05:16,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:16,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 12:05:16,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:16,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 12:05:16,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:05:16,446 INFO L87 Difference]: Start difference. First operand 2792 states and 3902 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 12:05:16,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:16,855 INFO L93 Difference]: Finished difference Result 4151 states and 6110 transitions. [2023-11-26 12:05:16,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 12:05:16,856 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2023-11-26 12:05:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:16,870 INFO L225 Difference]: With dead ends: 4151 [2023-11-26 12:05:16,870 INFO L226 Difference]: Without dead ends: 1642 [2023-11-26 12:05:16,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2023-11-26 12:05:16,894 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 53 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:16,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 96 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:05:16,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2023-11-26 12:05:17,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1621. [2023-11-26 12:05:17,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1208 states have (on average 1.1018211920529801) internal successors, (1331), 1240 states have internal predecessors, (1331), 292 states have call successors, (292), 91 states have call predecessors, (292), 117 states have return successors, (461), 289 states have call predecessors, (461), 288 states have call successors, (461) [2023-11-26 12:05:17,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2084 transitions. [2023-11-26 12:05:17,190 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2084 transitions. Word has length 43 [2023-11-26 12:05:17,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:17,191 INFO L495 AbstractCegarLoop]: Abstraction has 1621 states and 2084 transitions. [2023-11-26 12:05:17,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 12:05:17,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2084 transitions. [2023-11-26 12:05:17,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-26 12:05:17,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:17,194 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:17,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:17,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 12:05:17,400 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:17,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:17,401 INFO L85 PathProgramCache]: Analyzing trace with hash 553185385, now seen corresponding path program 1 times [2023-11-26 12:05:17,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:17,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894941157] [2023-11-26 12:05:17,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:17,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:17,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 12:05:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:17,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:05:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:17,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 12:05:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:17,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-26 12:05:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 12:05:17,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:17,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894941157] [2023-11-26 12:05:17,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894941157] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:17,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194019303] [2023-11-26 12:05:17,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:17,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:17,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:17,739 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:17,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 12:05:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:17,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 12:05:17,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-26 12:05:17,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 12:05:18,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194019303] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:18,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:18,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-11-26 12:05:18,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288113076] [2023-11-26 12:05:18,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:18,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 12:05:18,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:18,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 12:05:18,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-11-26 12:05:18,502 INFO L87 Difference]: Start difference. First operand 1621 states and 2084 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 21 states have internal predecessors, (57), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-26 12:05:20,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:20,343 INFO L93 Difference]: Finished difference Result 4070 states and 7471 transitions. [2023-11-26 12:05:20,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-26 12:05:20,344 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 21 states have internal predecessors, (57), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 52 [2023-11-26 12:05:20,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:20,385 INFO L225 Difference]: With dead ends: 4070 [2023-11-26 12:05:20,385 INFO L226 Difference]: Without dead ends: 4064 [2023-11-26 12:05:20,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1158, Invalid=5004, Unknown=0, NotChecked=0, Total=6162 [2023-11-26 12:05:20,392 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 311 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:20,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 179 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:05:20,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2023-11-26 12:05:20,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 2920. [2023-11-26 12:05:20,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2920 states, 2019 states have (on average 1.0787518573551262) internal successors, (2178), 2051 states have internal predecessors, (2178), 557 states have call successors, (557), 105 states have call predecessors, (557), 340 states have return successors, (3218), 763 states have call predecessors, (3218), 551 states have call successors, (3218) [2023-11-26 12:05:20,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 5953 transitions. [2023-11-26 12:05:20,955 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 5953 transitions. Word has length 52 [2023-11-26 12:05:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:20,955 INFO L495 AbstractCegarLoop]: Abstraction has 2920 states and 5953 transitions. [2023-11-26 12:05:20,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 21 states have internal predecessors, (57), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-26 12:05:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 5953 transitions. [2023-11-26 12:05:20,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-26 12:05:20,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:20,959 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-11-26 12:05:20,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:21,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 12:05:21,166 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:21,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:21,167 INFO L85 PathProgramCache]: Analyzing trace with hash -352778574, now seen corresponding path program 1 times [2023-11-26 12:05:21,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:21,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304951578] [2023-11-26 12:05:21,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:21,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 12:05:21,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:21,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304951578] [2023-11-26 12:05:21,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304951578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:21,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222993771] [2023-11-26 12:05:21,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:21,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:21,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:21,418 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:21,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 12:05:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:21,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 12:05:21,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 12:05:21,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 12:05:21,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222993771] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:21,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:21,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-11-26 12:05:21,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336497826] [2023-11-26 12:05:21,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:21,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 12:05:21,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:21,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 12:05:21,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-11-26 12:05:21,834 INFO L87 Difference]: Start difference. First operand 2920 states and 5953 transitions. Second operand has 24 states, 23 states have (on average 3.608695652173913) internal successors, (83), 14 states have internal predecessors, (83), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:23,553 INFO L93 Difference]: Finished difference Result 7979 states and 16568 transitions. [2023-11-26 12:05:23,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-26 12:05:23,564 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.608695652173913) internal successors, (83), 14 states have internal predecessors, (83), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-26 12:05:23,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:23,665 INFO L225 Difference]: With dead ends: 7979 [2023-11-26 12:05:23,665 INFO L226 Difference]: Without dead ends: 7978 [2023-11-26 12:05:23,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-11-26 12:05:23,671 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 580 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:23,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 301 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 12:05:23,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7978 states. [2023-11-26 12:05:25,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7978 to 7894. [2023-11-26 12:05:25,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7894 states, 5499 states have (on average 1.0812875068194217) internal successors, (5946), 5603 states have internal predecessors, (5946), 1505 states have call successors, (1505), 303 states have call predecessors, (1505), 886 states have return successors, (8678), 1987 states have call predecessors, (8678), 1499 states have call successors, (8678) [2023-11-26 12:05:25,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7894 states to 7894 states and 16129 transitions. [2023-11-26 12:05:25,174 INFO L78 Accepts]: Start accepts. Automaton has 7894 states and 16129 transitions. Word has length 56 [2023-11-26 12:05:25,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:25,174 INFO L495 AbstractCegarLoop]: Abstraction has 7894 states and 16129 transitions. [2023-11-26 12:05:25,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.608695652173913) internal successors, (83), 14 states have internal predecessors, (83), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:05:25,175 INFO L276 IsEmpty]: Start isEmpty. Operand 7894 states and 16129 transitions. [2023-11-26 12:05:25,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-26 12:05:25,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:25,177 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:25,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:25,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:25,384 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:25,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:25,384 INFO L85 PathProgramCache]: Analyzing trace with hash -959769808, now seen corresponding path program 1 times [2023-11-26 12:05:25,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:25,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679384079] [2023-11-26 12:05:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:25,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:25,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 12:05:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:25,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:05:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:25,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 12:05:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:25,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-26 12:05:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 12:05:25,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:25,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679384079] [2023-11-26 12:05:25,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679384079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:25,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470616011] [2023-11-26 12:05:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:25,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:25,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:25,688 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:25,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 12:05:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:25,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 12:05:25,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-26 12:05:25,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 12:05:26,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470616011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:26,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:26,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-11-26 12:05:26,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716868986] [2023-11-26 12:05:26,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:26,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 12:05:26,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:26,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 12:05:26,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-11-26 12:05:26,437 INFO L87 Difference]: Start difference. First operand 7894 states and 16129 transitions. Second operand has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 21 states have internal predecessors, (61), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-26 12:05:31,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:31,038 INFO L93 Difference]: Finished difference Result 29481 states and 111101 transitions. [2023-11-26 12:05:31,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-26 12:05:31,038 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 21 states have internal predecessors, (61), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2023-11-26 12:05:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:31,388 INFO L225 Difference]: With dead ends: 29481 [2023-11-26 12:05:31,388 INFO L226 Difference]: Without dead ends: 22941 [2023-11-26 12:05:31,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1250, Invalid=4756, Unknown=0, NotChecked=0, Total=6006 [2023-11-26 12:05:31,613 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 130 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:31,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 366 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 12:05:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22941 states. [2023-11-26 12:05:35,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22941 to 16587. [2023-11-26 12:05:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16587 states, 10883 states have (on average 1.0526509234586052) internal successors, (11456), 10948 states have internal predecessors, (11456), 3293 states have call successors, (3293), 380 states have call predecessors, (3293), 2407 states have return successors, (45164), 5258 states have call predecessors, (45164), 3282 states have call successors, (45164) [2023-11-26 12:05:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16587 states to 16587 states and 59913 transitions. [2023-11-26 12:05:36,191 INFO L78 Accepts]: Start accepts. Automaton has 16587 states and 59913 transitions. Word has length 54 [2023-11-26 12:05:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:36,192 INFO L495 AbstractCegarLoop]: Abstraction has 16587 states and 59913 transitions. [2023-11-26 12:05:36,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 21 states have internal predecessors, (61), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-26 12:05:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 16587 states and 59913 transitions. [2023-11-26 12:05:36,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-26 12:05:36,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:36,195 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:36,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:36,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:36,402 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-26 12:05:36,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:36,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1843660921, now seen corresponding path program 2 times [2023-11-26 12:05:36,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:36,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155944581] [2023-11-26 12:05:36,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:36,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:36,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 12:05:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:36,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 12:05:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:36,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:05:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:36,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 12:05:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:36,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-26 12:05:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 70 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-26 12:05:36,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:36,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155944581] [2023-11-26 12:05:36,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155944581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:36,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465278389] [2023-11-26 12:05:36,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:05:36,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:36,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:36,829 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:36,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e4fd77-85ed-4309-92d1-e169bc58664d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 12:05:36,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:05:36,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:05:36,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 12:05:36,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-26 12:05:36,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-26 12:05:38,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465278389] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:38,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:38,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2023-11-26 12:05:38,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548688956] [2023-11-26 12:05:38,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:38,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-26 12:05:38,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:38,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-26 12:05:38,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2023-11-26 12:05:38,289 INFO L87 Difference]: Start difference. First operand 16587 states and 59913 transitions. Second operand has 33 states, 32 states have (on average 2.40625) internal successors, (77), 23 states have internal predecessors, (77), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-26 12:05:41,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:41,357 INFO L93 Difference]: Finished difference Result 25420 states and 94290 transitions. [2023-11-26 12:05:41,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-26 12:05:41,358 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.40625) internal successors, (77), 23 states have internal predecessors, (77), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2023-11-26 12:05:41,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:41,458 INFO L225 Difference]: With dead ends: 25420 [2023-11-26 12:05:41,458 INFO L226 Difference]: Without dead ends: 10187 [2023-11-26 12:05:41,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=673, Invalid=2633, Unknown=0, NotChecked=0, Total=3306 [2023-11-26 12:05:41,782 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 209 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:41,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 316 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 12:05:41,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10187 states.