./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/Ackermann03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB --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 c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:20:27,577 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:20:27,673 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-28 04:20:27,680 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:20:27,681 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:20:27,706 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:20:27,707 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:20:27,707 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:20:27,707 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:20:27,707 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:20:27,708 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:20:27,708 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:20:27,708 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:20:27,708 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:20:27,708 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:20:27,709 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:20:27,709 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:20:27,709 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:20:27,709 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:20:27,709 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:20:27,709 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:20:27,709 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:20:27,710 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:20:27,710 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:20:27,710 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-28 04:20:27,710 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:20:27,710 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:20:27,710 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:20:27,710 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:20:27,711 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:20:27,711 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:20:27,711 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:20:27,711 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:20:27,711 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:20:27,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:20:27,712 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:20:27,712 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:20:27,712 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:20:27,712 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:20:27,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:20:27,712 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:20:27,712 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:20:27,713 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:20:27,713 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:20:27,713 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:20:27,713 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:20:27,713 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:20:27,713 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:20:27,713 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:20:27,714 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:20:27,714 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB 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 -> c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd [2024-11-28 04:20:28,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:20:28,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:20:28,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:20:28,066 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:20:28,066 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:20:28,067 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursive/Ackermann03.c [2024-11-28 04:20:31,109 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/data/b04abbb08/0dd2bbf8a68944509d7e9c2681314efe/FLAGf803ed0b8 [2024-11-28 04:20:31,382 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:20:31,383 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/sv-benchmarks/c/recursive/Ackermann03.c [2024-11-28 04:20:31,395 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/data/b04abbb08/0dd2bbf8a68944509d7e9c2681314efe/FLAGf803ed0b8 [2024-11-28 04:20:31,418 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/data/b04abbb08/0dd2bbf8a68944509d7e9c2681314efe [2024-11-28 04:20:31,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:20:31,423 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:20:31,427 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:20:31,427 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:20:31,432 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:20:31,432 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:20:31" (1/1) ... [2024-11-28 04:20:31,433 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@81677d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:20:31, skipping insertion in model container [2024-11-28 04:20:31,434 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:20:31" (1/1) ... [2024-11-28 04:20:31,452 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:20:31,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:20:31,645 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:20:31,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:20:31,674 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:20:31,675 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:20:31 WrapperNode [2024-11-28 04:20:31,675 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:20:31,676 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:20:31,676 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:20:31,676 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:20:31,684 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:20:31" (1/1) ... [2024-11-28 04:20:31,690 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:20:31" (1/1) ... [2024-11-28 04:20:31,707 INFO L138 Inliner]: procedures = 13, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2024-11-28 04:20:31,707 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:20:31,707 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:20:31,708 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:20:31,708 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:20:31,717 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:20:31" (1/1) ... [2024-11-28 04:20:31,717 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:20:31" (1/1) ... [2024-11-28 04:20:31,718 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:20:31" (1/1) ... [2024-11-28 04:20:31,728 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]. [2024-11-28 04:20:31,729 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:20:31" (1/1) ... [2024-11-28 04:20:31,729 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:20:31" (1/1) ... [2024-11-28 04:20:31,731 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:20:31" (1/1) ... [2024-11-28 04:20:31,732 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:20:31" (1/1) ... [2024-11-28 04:20:31,738 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:20:31" (1/1) ... [2024-11-28 04:20:31,739 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:20:31" (1/1) ... [2024-11-28 04:20:31,740 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:20:31" (1/1) ... [2024-11-28 04:20:31,741 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:20:31,743 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:20:31,744 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:20:31,744 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:20:31,745 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:20:31" (1/1) ... [2024-11-28 04:20:31,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:20:31,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:31,779 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:20:31,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:20:31,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:20:31,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:20:31,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:20:31,817 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2024-11-28 04:20:31,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2024-11-28 04:20:31,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:20:31,892 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:20:31,894 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:20:32,092 INFO L? ?]: Removed 21 outVars from TransFormulas that were not future-live. [2024-11-28 04:20:32,094 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:20:32,108 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:20:32,108 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-28 04:20:32,108 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:20:32 BoogieIcfgContainer [2024-11-28 04:20:32,109 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:20:32,111 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:20:32,111 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:20:32,117 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:20:32,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:20:31" (1/3) ... [2024-11-28 04:20:32,119 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3983d7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:20:32, skipping insertion in model container [2024-11-28 04:20:32,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:20:31" (2/3) ... [2024-11-28 04:20:32,119 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3983d7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:20:32, skipping insertion in model container [2024-11-28 04:20:32,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:20:32" (3/3) ... [2024-11-28 04:20:32,121 INFO L128 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2024-11-28 04:20:32,145 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:20:32,146 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Ackermann03.c that has 2 procedures, 39 locations, 1 initial locations, 0 loop locations, and 8 error locations. [2024-11-28 04:20:32,199 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:20:32,212 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@52efd6f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:20:32,212 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-28 04:20:32,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 25 states have (on average 1.52) internal successors, (38), 33 states have internal predecessors, (38), 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) [2024-11-28 04:20:32,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 04:20:32,223 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:32,224 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:32,224 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:32,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:32,230 INFO L85 PathProgramCache]: Analyzing trace with hash 180823785, now seen corresponding path program 1 times [2024-11-28 04:20:32,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:32,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756624789] [2024-11-28 04:20:32,239 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:32,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:20:32,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:32,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756624789] [2024-11-28 04:20:32,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756624789] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:20:32,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:20:32,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:20:32,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975636514] [2024-11-28 04:20:32,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:20:32,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:20:32,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:32,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:20:32,503 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:20:32,505 INFO L87 Difference]: Start difference. First operand has 39 states, 25 states have (on average 1.52) internal successors, (38), 33 states have internal predecessors, (38), 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 2.3333333333333335) 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) [2024-11-28 04:20:32,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:32,700 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2024-11-28 04:20:32,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:20:32,703 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 [2024-11-28 04:20:32,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:32,711 INFO L225 Difference]: With dead ends: 71 [2024-11-28 04:20:32,711 INFO L226 Difference]: Without dead ends: 59 [2024-11-28 04:20:32,714 INFO L434 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 [2024-11-28 04:20:32,721 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 36 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:32,722 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 119 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:20:32,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-28 04:20:32,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2024-11-28 04:20:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 42 states have internal predecessors, (52), 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) [2024-11-28 04:20:32,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2024-11-28 04:20:32,764 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2024-11-28 04:20:32,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:32,765 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2024-11-28 04:20:32,765 INFO L472 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) [2024-11-28 04:20:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2024-11-28 04:20:32,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-28 04:20:32,766 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:32,766 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:32,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:20:32,766 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:32,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:32,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1310575100, now seen corresponding path program 1 times [2024-11-28 04:20:32,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:32,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641178032] [2024-11-28 04:20:32,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:32,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:20:32,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:32,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641178032] [2024-11-28 04:20:32,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641178032] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:20:32,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:20:32,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:20:32,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671214587] [2024-11-28 04:20:32,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:20:32,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:20:32,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:32,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:20:32,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:20:32,850 INFO L87 Difference]: Start difference. First operand 51 states and 65 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) [2024-11-28 04:20:33,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:33,013 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2024-11-28 04:20:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:20:33,016 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 [2024-11-28 04:20:33,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:33,017 INFO L225 Difference]: With dead ends: 101 [2024-11-28 04:20:33,018 INFO L226 Difference]: Without dead ends: 93 [2024-11-28 04:20:33,018 INFO L434 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 [2024-11-28 04:20:33,019 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 36 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:33,021 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 105 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:20:33,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-28 04:20:33,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2024-11-28 04:20:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 70 states have internal predecessors, (92), 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) [2024-11-28 04:20:33,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2024-11-28 04:20:33,049 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 9 [2024-11-28 04:20:33,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:33,049 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2024-11-28 04:20:33,049 INFO L472 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) [2024-11-28 04:20:33,049 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2024-11-28 04:20:33,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-28 04:20:33,050 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:33,050 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:33,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:20:33,054 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:33,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:33,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1310570103, now seen corresponding path program 1 times [2024-11-28 04:20:33,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:33,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049682813] [2024-11-28 04:20:33,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:33,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:20:33,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:33,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049682813] [2024-11-28 04:20:33,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049682813] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:20:33,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:20:33,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:20:33,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409169027] [2024-11-28 04:20:33,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:20:33,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:20:33,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:33,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:20:33,183 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:20:33,184 INFO L87 Difference]: Start difference. First operand 85 states and 115 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) 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) [2024-11-28 04:20:33,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:33,334 INFO L93 Difference]: Finished difference Result 118 states and 157 transitions. [2024-11-28 04:20:33,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:20:33,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) 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 [2024-11-28 04:20:33,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:33,338 INFO L225 Difference]: With dead ends: 118 [2024-11-28 04:20:33,338 INFO L226 Difference]: Without dead ends: 114 [2024-11-28 04:20:33,339 INFO L434 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 [2024-11-28 04:20:33,343 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:33,343 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 97 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:20:33,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-28 04:20:33,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 102. [2024-11-28 04:20:33,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.445945945945946) internal successors, (107), 83 states have internal predecessors, (107), 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) [2024-11-28 04:20:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2024-11-28 04:20:33,378 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 9 [2024-11-28 04:20:33,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:33,378 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2024-11-28 04:20:33,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) 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) [2024-11-28 04:20:33,379 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2024-11-28 04:20:33,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 04:20:33,379 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:33,379 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:33,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 04:20:33,380 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:33,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:33,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1973122508, now seen corresponding path program 1 times [2024-11-28 04:20:33,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:33,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807841213] [2024-11-28 04:20:33,382 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:33,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:20:33,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:33,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807841213] [2024-11-28 04:20:33,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807841213] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:20:33,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:20:33,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:20:33,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122105332] [2024-11-28 04:20:33,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:20:33,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:20:33,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:33,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:20:33,494 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:20:33,494 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-11-28 04:20:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:33,591 INFO L93 Difference]: Finished difference Result 110 states and 153 transitions. [2024-11-28 04:20:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:20:33,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 10 [2024-11-28 04:20:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:33,594 INFO L225 Difference]: With dead ends: 110 [2024-11-28 04:20:33,594 INFO L226 Difference]: Without dead ends: 108 [2024-11-28 04:20:33,594 INFO L434 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 [2024-11-28 04:20:33,598 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 35 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:33,598 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 54 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:20:33,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-28 04:20:33,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2024-11-28 04:20:33,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 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) [2024-11-28 04:20:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2024-11-28 04:20:33,615 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2024-11-28 04:20:33,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:33,616 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2024-11-28 04:20:33,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-11-28 04:20:33,616 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2024-11-28 04:20:33,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-28 04:20:33,616 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:33,617 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:33,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 04:20:33,617 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:33,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:33,618 INFO L85 PathProgramCache]: Analyzing trace with hash -612398535, now seen corresponding path program 1 times [2024-11-28 04:20:33,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:33,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86370158] [2024-11-28 04:20:33,618 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:33,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:20:33,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:33,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86370158] [2024-11-28 04:20:33,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86370158] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:20:33,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:20:33,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:20:33,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452098755] [2024-11-28 04:20:33,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:20:33,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:20:33,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:33,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:20:33,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:20:33,702 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2024-11-28 04:20:33,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:33,789 INFO L93 Difference]: Finished difference Result 170 states and 225 transitions. [2024-11-28 04:20:33,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:20:33,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 15 [2024-11-28 04:20:33,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:33,793 INFO L225 Difference]: With dead ends: 170 [2024-11-28 04:20:33,793 INFO L226 Difference]: Without dead ends: 99 [2024-11-28 04:20:33,794 INFO L434 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 [2024-11-28 04:20:33,797 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 25 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 89 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 [2024-11-28 04:20:33,798 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 89 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:20:33,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-28 04:20:33,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2024-11-28 04:20:33,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 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) [2024-11-28 04:20:33,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2024-11-28 04:20:33,825 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2024-11-28 04:20:33,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:33,825 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2024-11-28 04:20:33,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2024-11-28 04:20:33,825 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2024-11-28 04:20:33,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-28 04:20:33,826 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:33,826 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:33,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 04:20:33,826 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:33,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:33,826 INFO L85 PathProgramCache]: Analyzing trace with hash -612398311, now seen corresponding path program 1 times [2024-11-28 04:20:33,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:33,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498712711] [2024-11-28 04:20:33,827 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:33,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:20:33,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:33,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498712711] [2024-11-28 04:20:33,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498712711] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:33,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042567740] [2024-11-28 04:20:33,915 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:33,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:33,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:33,919 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:33,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:20:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:33,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:20:33,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:20:34,020 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:20:34,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042567740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:20:34,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:20:34,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-28 04:20:34,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697439487] [2024-11-28 04:20:34,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:34,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:20:34,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:34,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:20:34,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:20:34,124 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 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) [2024-11-28 04:20:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:34,532 INFO L93 Difference]: Finished difference Result 276 states and 359 transitions. [2024-11-28 04:20:34,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:20:34,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 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 15 [2024-11-28 04:20:34,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:34,536 INFO L225 Difference]: With dead ends: 276 [2024-11-28 04:20:34,536 INFO L226 Difference]: Without dead ends: 274 [2024-11-28 04:20:34,537 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:20:34,538 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 215 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:34,538 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 206 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:20:34,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-11-28 04:20:34,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 236. [2024-11-28 04:20:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 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) [2024-11-28 04:20:34,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2024-11-28 04:20:34,586 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2024-11-28 04:20:34,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:34,586 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2024-11-28 04:20:34,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 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) [2024-11-28 04:20:34,586 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2024-11-28 04:20:34,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 04:20:34,587 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:34,588 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:34,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 04:20:34,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 04:20:34,788 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:34,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:34,789 INFO L85 PathProgramCache]: Analyzing trace with hash -600892461, now seen corresponding path program 1 times [2024-11-28 04:20:34,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:34,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481588779] [2024-11-28 04:20:34,789 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:34,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:20:34,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:34,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481588779] [2024-11-28 04:20:34,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481588779] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:34,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273750718] [2024-11-28 04:20:34,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:34,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:34,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:34,877 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:34,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:20:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:34,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:20:34,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:20:34,964 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:20:35,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273750718] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:20:35,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:20:35,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-28 04:20:35,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526533478] [2024-11-28 04:20:35,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:35,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:20:35,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:35,074 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:20:35,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:20:35,075 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 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) [2024-11-28 04:20:35,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:35,492 INFO L93 Difference]: Finished difference Result 498 states and 669 transitions. [2024-11-28 04:20:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:20:35,492 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 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 16 [2024-11-28 04:20:35,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:35,500 INFO L225 Difference]: With dead ends: 498 [2024-11-28 04:20:35,500 INFO L226 Difference]: Without dead ends: 496 [2024-11-28 04:20:35,501 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:20:35,501 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 142 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:35,501 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 162 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:20:35,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2024-11-28 04:20:35,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 445. [2024-11-28 04:20:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 347 states have (on average 1.2276657060518732) internal successors, (426), 354 states have internal predecessors, (426), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2024-11-28 04:20:35,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 561 transitions. [2024-11-28 04:20:35,598 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 561 transitions. Word has length 16 [2024-11-28 04:20:35,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:35,598 INFO L471 AbstractCegarLoop]: Abstraction has 445 states and 561 transitions. [2024-11-28 04:20:35,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 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) [2024-11-28 04:20:35,599 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 561 transitions. [2024-11-28 04:20:35,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 04:20:35,600 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:35,600 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:35,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:20:35,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:35,804 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:35,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:35,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1979487198, now seen corresponding path program 1 times [2024-11-28 04:20:35,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:35,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721877031] [2024-11-28 04:20:35,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:35,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:20:35,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:35,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721877031] [2024-11-28 04:20:35,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721877031] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:35,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728485694] [2024-11-28 04:20:35,958 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:35,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:35,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:35,961 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:35,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:20:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:36,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:20:36,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:20:36,113 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:20:36,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728485694] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:20:36,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:20:36,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2024-11-28 04:20:36,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712500767] [2024-11-28 04:20:36,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:20:36,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:20:36,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:36,116 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:20:36,119 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:20:36,120 INFO L87 Difference]: Start difference. First operand 445 states and 561 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2024-11-28 04:20:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:36,413 INFO L93 Difference]: Finished difference Result 494 states and 650 transitions. [2024-11-28 04:20:36,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:20:36,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 24 [2024-11-28 04:20:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:36,418 INFO L225 Difference]: With dead ends: 494 [2024-11-28 04:20:36,418 INFO L226 Difference]: Without dead ends: 493 [2024-11-28 04:20:36,419 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:20:36,419 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 34 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:36,420 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 159 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:20:36,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2024-11-28 04:20:36,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 444. [2024-11-28 04:20:36,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 347 states have (on average 1.2161383285302594) internal successors, (422), 353 states have internal predecessors, (422), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2024-11-28 04:20:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 557 transitions. [2024-11-28 04:20:36,485 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 557 transitions. Word has length 24 [2024-11-28 04:20:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:36,486 INFO L471 AbstractCegarLoop]: Abstraction has 444 states and 557 transitions. [2024-11-28 04:20:36,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2024-11-28 04:20:36,486 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 557 transitions. [2024-11-28 04:20:36,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 04:20:36,487 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:36,487 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:36,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:20:36,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:36,692 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:36,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:36,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1234561058, now seen corresponding path program 1 times [2024-11-28 04:20:36,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:36,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270547431] [2024-11-28 04:20:36,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:36,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:20:36,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:36,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270547431] [2024-11-28 04:20:36,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270547431] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:36,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863189073] [2024-11-28 04:20:36,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:36,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:36,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:36,826 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:36,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:20:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:36,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:20:36,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:20:36,933 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:20:37,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863189073] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:20:37,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:20:37,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-28 04:20:37,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462170554] [2024-11-28 04:20:37,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:37,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:20:37,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:37,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:20:37,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:20:37,188 INFO L87 Difference]: Start difference. First operand 444 states and 557 transitions. Second operand has 14 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 12 states have internal predecessors, (37), 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) [2024-11-28 04:20:37,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:37,607 INFO L93 Difference]: Finished difference Result 765 states and 1085 transitions. [2024-11-28 04:20:37,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:20:37,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 12 states have internal predecessors, (37), 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 25 [2024-11-28 04:20:37,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:37,613 INFO L225 Difference]: With dead ends: 765 [2024-11-28 04:20:37,613 INFO L226 Difference]: Without dead ends: 763 [2024-11-28 04:20:37,614 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:20:37,615 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:37,616 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 133 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:20:37,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2024-11-28 04:20:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 655. [2024-11-28 04:20:37,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 491 states have (on average 1.19959266802444) internal successors, (589), 512 states have internal predecessors, (589), 114 states have call successors, (114), 31 states have call predecessors, (114), 45 states have return successors, (134), 111 states have call predecessors, (134), 110 states have call successors, (134) [2024-11-28 04:20:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 837 transitions. [2024-11-28 04:20:37,771 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 837 transitions. Word has length 25 [2024-11-28 04:20:37,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:37,771 INFO L471 AbstractCegarLoop]: Abstraction has 655 states and 837 transitions. [2024-11-28 04:20:37,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 12 states have internal predecessors, (37), 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) [2024-11-28 04:20:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 837 transitions. [2024-11-28 04:20:37,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 04:20:37,774 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:37,777 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:37,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:20:37,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:37,977 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:37,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:37,978 INFO L85 PathProgramCache]: Analyzing trace with hash -2137182870, now seen corresponding path program 1 times [2024-11-28 04:20:37,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:37,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009474817] [2024-11-28 04:20:37,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:37,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:20:38,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:38,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009474817] [2024-11-28 04:20:38,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009474817] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:38,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820912267] [2024-11-28 04:20:38,113 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:38,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:38,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:38,115 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:38,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:20:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:38,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:20:38,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:20:38,230 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:20:38,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820912267] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:20:38,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:20:38,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-28 04:20:38,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893862346] [2024-11-28 04:20:38,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:38,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:20:38,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:38,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:20:38,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:20:38,409 INFO L87 Difference]: Start difference. First operand 655 states and 837 transitions. Second operand has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:20:38,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:38,974 INFO L93 Difference]: Finished difference Result 1017 states and 1385 transitions. [2024-11-28 04:20:38,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 04:20:38,975 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-28 04:20:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:38,984 INFO L225 Difference]: With dead ends: 1017 [2024-11-28 04:20:38,984 INFO L226 Difference]: Without dead ends: 1016 [2024-11-28 04:20:38,985 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:20:38,987 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 361 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:38,989 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 195 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:20:38,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2024-11-28 04:20:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 931. [2024-11-28 04:20:39,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 695 states have (on average 1.1697841726618705) internal successors, (813), 728 states have internal predecessors, (813), 162 states have call successors, (162), 43 states have call predecessors, (162), 69 states have return successors, (194), 159 states have call predecessors, (194), 158 states have call successors, (194) [2024-11-28 04:20:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1169 transitions. [2024-11-28 04:20:39,155 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1169 transitions. Word has length 27 [2024-11-28 04:20:39,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:39,156 INFO L471 AbstractCegarLoop]: Abstraction has 931 states and 1169 transitions. [2024-11-28 04:20:39,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:20:39,156 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1169 transitions. [2024-11-28 04:20:39,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 04:20:39,158 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:39,158 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:39,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 04:20:39,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:39,361 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:39,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:39,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1007222953, now seen corresponding path program 1 times [2024-11-28 04:20:39,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:39,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938385796] [2024-11-28 04:20:39,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:39,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:20:39,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:39,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938385796] [2024-11-28 04:20:39,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938385796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:39,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078572185] [2024-11-28 04:20:39,521 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:39,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:39,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:39,524 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:39,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:20:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:39,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:20:39,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:20:39,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:20:39,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078572185] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:20:39,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:20:39,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-28 04:20:39,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307126416] [2024-11-28 04:20:39,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:39,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:20:39,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:39,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:20:39,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:20:39,874 INFO L87 Difference]: Start difference. First operand 931 states and 1169 transitions. Second operand has 14 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 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) [2024-11-28 04:20:40,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:40,471 INFO L93 Difference]: Finished difference Result 1360 states and 1921 transitions. [2024-11-28 04:20:40,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:20:40,472 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 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 27 [2024-11-28 04:20:40,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:40,482 INFO L225 Difference]: With dead ends: 1360 [2024-11-28 04:20:40,482 INFO L226 Difference]: Without dead ends: 1348 [2024-11-28 04:20:40,483 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:20:40,485 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 135 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:40,485 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 159 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:20:40,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2024-11-28 04:20:40,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1161. [2024-11-28 04:20:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 863 states have (on average 1.1657010428736965) internal successors, (1006), 903 states have internal predecessors, (1006), 209 states have call successors, (209), 53 states have call predecessors, (209), 84 states have return successors, (255), 204 states have call predecessors, (255), 202 states have call successors, (255) [2024-11-28 04:20:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1470 transitions. [2024-11-28 04:20:40,647 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1470 transitions. Word has length 27 [2024-11-28 04:20:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:40,648 INFO L471 AbstractCegarLoop]: Abstraction has 1161 states and 1470 transitions. [2024-11-28 04:20:40,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 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) [2024-11-28 04:20:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1470 transitions. [2024-11-28 04:20:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 04:20:40,650 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:40,650 INFO L218 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, 1] [2024-11-28 04:20:40,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:20:40,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:40,854 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:40,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:40,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1878013265, now seen corresponding path program 1 times [2024-11-28 04:20:40,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:40,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020727887] [2024-11-28 04:20:40,854 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:40,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:20:40,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:40,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020727887] [2024-11-28 04:20:40,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020727887] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:40,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445935641] [2024-11-28 04:20:40,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:40,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:40,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:40,994 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:40,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:20:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:41,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:20:41,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:20:41,107 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:20:41,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445935641] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:20:41,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:20:41,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-28 04:20:41,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924525234] [2024-11-28 04:20:41,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:41,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:20:41,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:41,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:20:41,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:20:41,377 INFO L87 Difference]: Start difference. First operand 1161 states and 1470 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 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) [2024-11-28 04:20:42,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:42,296 INFO L93 Difference]: Finished difference Result 2210 states and 3667 transitions. [2024-11-28 04:20:42,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:20:42,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 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 34 [2024-11-28 04:20:42,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:42,321 INFO L225 Difference]: With dead ends: 2210 [2024-11-28 04:20:42,321 INFO L226 Difference]: Without dead ends: 2172 [2024-11-28 04:20:42,324 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:20:42,326 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 84 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:42,326 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 215 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:20:42,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2024-11-28 04:20:42,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1777. [2024-11-28 04:20:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1272 states have (on average 1.1517295597484276) internal successors, (1465), 1339 states have internal predecessors, (1465), 338 states have call successors, (338), 73 states have call predecessors, (338), 162 states have return successors, (744), 364 states have call predecessors, (744), 323 states have call successors, (744) [2024-11-28 04:20:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2547 transitions. [2024-11-28 04:20:42,650 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2547 transitions. Word has length 34 [2024-11-28 04:20:42,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:42,651 INFO L471 AbstractCegarLoop]: Abstraction has 1777 states and 2547 transitions. [2024-11-28 04:20:42,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 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) [2024-11-28 04:20:42,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2547 transitions. [2024-11-28 04:20:42,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 04:20:42,652 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:42,652 INFO L218 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, 1] [2024-11-28 04:20:42,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 04:20:42,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:42,857 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:42,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:42,857 INFO L85 PathProgramCache]: Analyzing trace with hash 889503256, now seen corresponding path program 1 times [2024-11-28 04:20:42,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:42,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056368903] [2024-11-28 04:20:42,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:42,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:20:43,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:43,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056368903] [2024-11-28 04:20:43,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056368903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:43,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151222604] [2024-11-28 04:20:43,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:43,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:43,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:43,010 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:43,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:20:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:43,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:20:43,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:20:43,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:20:43,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151222604] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:43,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:20:43,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2024-11-28 04:20:43,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001906541] [2024-11-28 04:20:43,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:20:43,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:20:43,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:43,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:20:43,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:20:43,388 INFO L87 Difference]: Start difference. First operand 1777 states and 2547 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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) [2024-11-28 04:20:44,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:44,004 INFO L93 Difference]: Finished difference Result 2034 states and 3188 transitions. [2024-11-28 04:20:44,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:20:44,005 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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 36 [2024-11-28 04:20:44,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:44,023 INFO L225 Difference]: With dead ends: 2034 [2024-11-28 04:20:44,023 INFO L226 Difference]: Without dead ends: 2033 [2024-11-28 04:20:44,025 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:20:44,026 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 36 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:44,027 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 206 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:20:44,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2024-11-28 04:20:44,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1785. [2024-11-28 04:20:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1280 states have (on average 1.1484375) internal successors, (1470), 1343 states have internal predecessors, (1470), 342 states have call successors, (342), 73 states have call predecessors, (342), 158 states have return successors, (616), 368 states have call predecessors, (616), 327 states have call successors, (616) [2024-11-28 04:20:44,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 2428 transitions. [2024-11-28 04:20:44,358 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 2428 transitions. Word has length 36 [2024-11-28 04:20:44,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:44,359 INFO L471 AbstractCegarLoop]: Abstraction has 1785 states and 2428 transitions. [2024-11-28 04:20:44,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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) [2024-11-28 04:20:44,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 2428 transitions. [2024-11-28 04:20:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:20:44,363 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:44,363 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:44,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 04:20:44,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 04:20:44,563 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:44,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:44,564 INFO L85 PathProgramCache]: Analyzing trace with hash 791091541, now seen corresponding path program 2 times [2024-11-28 04:20:44,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:44,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867441810] [2024-11-28 04:20:44,565 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:20:44,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:44,578 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:20:44,578 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:20:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 04:20:44,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:44,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867441810] [2024-11-28 04:20:44,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867441810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:44,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275295798] [2024-11-28 04:20:44,756 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:20:44,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:44,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:44,758 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:44,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:20:44,804 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:20:44,805 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:20:44,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:20:44,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 04:20:44,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 04:20:45,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275295798] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:20:45,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:20:45,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-11-28 04:20:45,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784013025] [2024-11-28 04:20:45,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:45,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 04:20:45,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:45,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 04:20:45,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:20:45,185 INFO L87 Difference]: Start difference. First operand 1785 states and 2428 transitions. Second operand has 22 states, 19 states have (on average 3.0) internal successors, (57), 16 states have internal predecessors, (57), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:20:46,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:46,445 INFO L93 Difference]: Finished difference Result 2842 states and 4279 transitions. [2024-11-28 04:20:46,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 04:20:46,446 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.0) internal successors, (57), 16 states have internal predecessors, (57), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2024-11-28 04:20:46,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:46,464 INFO L225 Difference]: With dead ends: 2842 [2024-11-28 04:20:46,464 INFO L226 Difference]: Without dead ends: 2841 [2024-11-28 04:20:46,467 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=339, Invalid=1301, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 04:20:46,467 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 250 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:46,468 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 340 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:20:46,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2024-11-28 04:20:46,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2615. [2024-11-28 04:20:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 1874 states have (on average 1.1408751334044824) internal successors, (2138), 1971 states have internal predecessors, (2138), 498 states have call successors, (498), 107 states have call predecessors, (498), 238 states have return successors, (922), 536 states have call predecessors, (922), 483 states have call successors, (922) [2024-11-28 04:20:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 3558 transitions. [2024-11-28 04:20:46,902 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 3558 transitions. Word has length 43 [2024-11-28 04:20:46,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:46,902 INFO L471 AbstractCegarLoop]: Abstraction has 2615 states and 3558 transitions. [2024-11-28 04:20:46,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.0) internal successors, (57), 16 states have internal predecessors, (57), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:20:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 3558 transitions. [2024-11-28 04:20:46,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 04:20:46,905 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:46,906 INFO L218 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, 1] [2024-11-28 04:20:46,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 04:20:47,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 04:20:47,107 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:47,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:47,107 INFO L85 PathProgramCache]: Analyzing trace with hash -328093970, now seen corresponding path program 2 times [2024-11-28 04:20:47,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:47,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671255490] [2024-11-28 04:20:47,108 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:20:47,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:47,121 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:20:47,121 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:20:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:20:47,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:47,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671255490] [2024-11-28 04:20:47,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671255490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:47,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257667678] [2024-11-28 04:20:47,329 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:20:47,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:47,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:47,332 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:47,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:20:47,384 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:20:47,384 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:20:47,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:20:47,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:20:47,475 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:20:47,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257667678] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:20:47,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:20:47,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2024-11-28 04:20:47,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482323700] [2024-11-28 04:20:47,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:47,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 04:20:47,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:47,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 04:20:47,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:20:47,826 INFO L87 Difference]: Start difference. First operand 2615 states and 3558 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 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) [2024-11-28 04:20:49,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:49,700 INFO L93 Difference]: Finished difference Result 5426 states and 9019 transitions. [2024-11-28 04:20:49,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-28 04:20:49,701 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 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 44 [2024-11-28 04:20:49,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:49,731 INFO L225 Difference]: With dead ends: 5426 [2024-11-28 04:20:49,732 INFO L226 Difference]: Without dead ends: 3895 [2024-11-28 04:20:49,751 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=501, Invalid=2049, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 04:20:49,751 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 196 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:49,752 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 293 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:20:49,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3895 states. [2024-11-28 04:20:50,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3895 to 2888. [2024-11-28 04:20:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2888 states, 2074 states have (on average 1.1374156219864995) internal successors, (2359), 2180 states have internal predecessors, (2359), 547 states have call successors, (547), 122 states have call predecessors, (547), 262 states have return successors, (1006), 585 states have call predecessors, (1006), 532 states have call successors, (1006) [2024-11-28 04:20:50,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2888 states to 2888 states and 3912 transitions. [2024-11-28 04:20:50,298 INFO L78 Accepts]: Start accepts. Automaton has 2888 states and 3912 transitions. Word has length 44 [2024-11-28 04:20:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:50,299 INFO L471 AbstractCegarLoop]: Abstraction has 2888 states and 3912 transitions. [2024-11-28 04:20:50,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 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) [2024-11-28 04:20:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2888 states and 3912 transitions. [2024-11-28 04:20:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 04:20:50,304 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:50,304 INFO L218 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, 1] [2024-11-28 04:20:50,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 04:20:50,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 04:20:50,509 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:50,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:50,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1781931564, now seen corresponding path program 1 times [2024-11-28 04:20:50,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:50,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307013322] [2024-11-28 04:20:50,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:50,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 04:20:50,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:50,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307013322] [2024-11-28 04:20:50,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307013322] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:50,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139736136] [2024-11-28 04:20:50,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:50,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:50,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:50,598 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:50,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:20:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:50,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:20:50,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 04:20:50,703 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 04:20:50,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139736136] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:20:50,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:20:50,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-11-28 04:20:50,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429679088] [2024-11-28 04:20:50,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:50,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:20:50,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:50,860 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:20:50,860 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:20:50,860 INFO L87 Difference]: Start difference. First operand 2888 states and 3912 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:20:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:51,491 INFO L93 Difference]: Finished difference Result 4468 states and 6527 transitions. [2024-11-28 04:20:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:20:51,491 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-11-28 04:20:51,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:51,506 INFO L225 Difference]: With dead ends: 4468 [2024-11-28 04:20:51,507 INFO L226 Difference]: Without dead ends: 2476 [2024-11-28 04:20:51,526 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:20:51,527 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 80 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:51,527 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 96 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:20:51,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2024-11-28 04:20:51,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1703. [2024-11-28 04:20:51,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1310 states have (on average 1.1778625954198474) internal successors, (1543), 1353 states have internal predecessors, (1543), 249 states have call successors, (249), 116 states have call predecessors, (249), 139 states have return successors, (368), 233 states have call predecessors, (368), 218 states have call successors, (368) [2024-11-28 04:20:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 2160 transitions. [2024-11-28 04:20:51,796 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 2160 transitions. Word has length 44 [2024-11-28 04:20:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:51,797 INFO L471 AbstractCegarLoop]: Abstraction has 1703 states and 2160 transitions. [2024-11-28 04:20:51,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:20:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 2160 transitions. [2024-11-28 04:20:51,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 04:20:51,800 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:51,800 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:51,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 04:20:52,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 04:20:52,005 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:52,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:52,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1331455508, now seen corresponding path program 1 times [2024-11-28 04:20:52,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:52,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435288941] [2024-11-28 04:20:52,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:52,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:20:52,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:52,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435288941] [2024-11-28 04:20:52,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435288941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:52,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313216293] [2024-11-28 04:20:52,160 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:52,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:52,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:52,162 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:52,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:20:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:52,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:20:52,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:20:52,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:20:52,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313216293] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:20:52,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:20:52,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2024-11-28 04:20:52,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874667793] [2024-11-28 04:20:52,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:52,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:20:52,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:52,411 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:20:52,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:20:52,412 INFO L87 Difference]: Start difference. First operand 1703 states and 2160 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:20:52,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:52,878 INFO L93 Difference]: Finished difference Result 1987 states and 2619 transitions. [2024-11-28 04:20:52,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:20:52,879 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-11-28 04:20:52,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:52,891 INFO L225 Difference]: With dead ends: 1987 [2024-11-28 04:20:52,891 INFO L226 Difference]: Without dead ends: 1807 [2024-11-28 04:20:52,893 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:20:52,894 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:52,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 172 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:20:52,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2024-11-28 04:20:53,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1729. [2024-11-28 04:20:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1331 states have (on average 1.175807663410969) internal successors, (1565), 1373 states have internal predecessors, (1565), 254 states have call successors, (254), 119 states have call predecessors, (254), 139 states have return successors, (370), 236 states have call predecessors, (370), 220 states have call successors, (370) [2024-11-28 04:20:53,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2189 transitions. [2024-11-28 04:20:53,152 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2189 transitions. Word has length 51 [2024-11-28 04:20:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:53,153 INFO L471 AbstractCegarLoop]: Abstraction has 1729 states and 2189 transitions. [2024-11-28 04:20:53,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:20:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2189 transitions. [2024-11-28 04:20:53,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 04:20:53,156 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:53,157 INFO L218 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, 1] [2024-11-28 04:20:53,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 04:20:53,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 04:20:53,362 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:53,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:53,362 INFO L85 PathProgramCache]: Analyzing trace with hash -603852535, now seen corresponding path program 1 times [2024-11-28 04:20:53,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:53,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024372015] [2024-11-28 04:20:53,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:53,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 04:20:53,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:53,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024372015] [2024-11-28 04:20:53,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024372015] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:53,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577394389] [2024-11-28 04:20:53,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:53,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:53,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:53,602 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:53,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:20:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:53,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 04:20:53,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-28 04:20:53,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 04:20:54,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577394389] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:20:54,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:20:54,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 25 [2024-11-28 04:20:54,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996845379] [2024-11-28 04:20:54,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:54,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 04:20:54,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:54,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 04:20:54,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2024-11-28 04:20:54,364 INFO L87 Difference]: Start difference. First operand 1729 states and 2189 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 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) [2024-11-28 04:20:57,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:57,265 INFO L93 Difference]: Finished difference Result 4144 states and 7114 transitions. [2024-11-28 04:20:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-28 04:20:57,266 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 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 53 [2024-11-28 04:20:57,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:57,298 INFO L225 Difference]: With dead ends: 4144 [2024-11-28 04:20:57,298 INFO L226 Difference]: Without dead ends: 4138 [2024-11-28 04:20:57,303 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2490 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1475, Invalid=7081, Unknown=0, NotChecked=0, Total=8556 [2024-11-28 04:20:57,304 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 161 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:57,304 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 274 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 04:20:57,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2024-11-28 04:20:57,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 2962. [2024-11-28 04:20:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2131 states have (on average 1.1426560300328483) internal successors, (2435), 2176 states have internal predecessors, (2435), 500 states have call successors, (500), 148 states have call predecessors, (500), 326 states have return successors, (2371), 637 states have call predecessors, (2371), 455 states have call successors, (2371) [2024-11-28 04:20:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 5306 transitions. [2024-11-28 04:20:57,939 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 5306 transitions. Word has length 53 [2024-11-28 04:20:57,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:57,939 INFO L471 AbstractCegarLoop]: Abstraction has 2962 states and 5306 transitions. [2024-11-28 04:20:57,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 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) [2024-11-28 04:20:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 5306 transitions. [2024-11-28 04:20:57,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-28 04:20:57,942 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:57,942 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:57,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 04:20:58,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 04:20:58,147 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:20:58,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:58,148 INFO L85 PathProgramCache]: Analyzing trace with hash 38844242, now seen corresponding path program 1 times [2024-11-28 04:20:58,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:58,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703174614] [2024-11-28 04:20:58,148 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:58,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:20:58,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:58,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703174614] [2024-11-28 04:20:58,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703174614] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:58,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803017820] [2024-11-28 04:20:58,404 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:58,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:58,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:58,408 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:58,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:20:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:58,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:20:58,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:20:58,574 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:20:58,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803017820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:20:58,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:20:58,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2024-11-28 04:20:58,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642729957] [2024-11-28 04:20:58,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:58,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:20:58,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:58,820 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:20:58,820 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:20:58,820 INFO L87 Difference]: Start difference. First operand 2962 states and 5306 transitions. Second operand has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 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) [2024-11-28 04:21:00,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:21:00,365 INFO L93 Difference]: Finished difference Result 8474 states and 15426 transitions. [2024-11-28 04:21:00,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 04:21:00,365 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 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 57 [2024-11-28 04:21:00,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:21:00,426 INFO L225 Difference]: With dead ends: 8474 [2024-11-28 04:21:00,426 INFO L226 Difference]: Without dead ends: 8472 [2024-11-28 04:21:00,431 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 04:21:00,432 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 579 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:21:00,432 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 365 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:21:00,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8472 states. [2024-11-28 04:21:01,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8472 to 8242. [2024-11-28 04:21:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8242 states, 5995 states have (on average 1.1457881567973311) internal successors, (6869), 6112 states have internal predecessors, (6869), 1370 states have call successors, (1370), 442 states have call predecessors, (1370), 872 states have return successors, (6355), 1687 states have call predecessors, (6355), 1253 states have call successors, (6355) [2024-11-28 04:21:01,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8242 states to 8242 states and 14594 transitions. [2024-11-28 04:21:01,861 INFO L78 Accepts]: Start accepts. Automaton has 8242 states and 14594 transitions. Word has length 57 [2024-11-28 04:21:01,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:21:01,862 INFO L471 AbstractCegarLoop]: Abstraction has 8242 states and 14594 transitions. [2024-11-28 04:21:01,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 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) [2024-11-28 04:21:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 8242 states and 14594 transitions. [2024-11-28 04:21:01,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 04:21:01,865 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:21:01,865 INFO L218 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, 1] [2024-11-28 04:21:01,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 04:21:02,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:21:02,066 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:21:02,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:21:02,066 INFO L85 PathProgramCache]: Analyzing trace with hash -476681264, now seen corresponding path program 1 times [2024-11-28 04:21:02,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:21:02,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031472713] [2024-11-28 04:21:02,067 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:21:02,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:21:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:21:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 04:21:02,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:21:02,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031472713] [2024-11-28 04:21:02,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031472713] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:21:02,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382983160] [2024-11-28 04:21:02,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:21:02,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:21:02,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:21:02,298 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:21:02,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:21:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:21:02,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 04:21:02,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:21:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-28 04:21:02,403 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:21:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 04:21:03,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382983160] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:21:03,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:21:03,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 25 [2024-11-28 04:21:03,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759551556] [2024-11-28 04:21:03,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:21:03,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 04:21:03,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:21:03,026 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 04:21:03,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2024-11-28 04:21:03,028 INFO L87 Difference]: Start difference. First operand 8242 states and 14594 transitions. Second operand has 26 states, 25 states have (on average 2.32) internal successors, (58), 20 states have internal predecessors, (58), 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) [2024-11-28 04:21:09,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:21:09,297 INFO L93 Difference]: Finished difference Result 34035 states and 100296 transitions. [2024-11-28 04:21:09,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-28 04:21:09,297 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 20 states have internal predecessors, (58), 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 55 [2024-11-28 04:21:09,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:21:09,584 INFO L225 Difference]: With dead ends: 34035 [2024-11-28 04:21:09,584 INFO L226 Difference]: Without dead ends: 26532 [2024-11-28 04:21:09,751 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2431 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1752, Invalid=7560, Unknown=0, NotChecked=0, Total=9312 [2024-11-28 04:21:09,752 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 169 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:21:09,753 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 398 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 04:21:09,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26532 states. [2024-11-28 04:21:14,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26532 to 18475. [2024-11-28 04:21:14,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18475 states, 12326 states have (on average 1.0888366055492456) internal successors, (13421), 12461 states have internal predecessors, (13421), 3618 states have call successors, (3618), 570 states have call predecessors, (3618), 2526 states have return successors, (38824), 5443 states have call predecessors, (38824), 3469 states have call successors, (38824) [2024-11-28 04:21:14,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18475 states to 18475 states and 55863 transitions. [2024-11-28 04:21:14,873 INFO L78 Accepts]: Start accepts. Automaton has 18475 states and 55863 transitions. Word has length 55 [2024-11-28 04:21:14,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:21:14,874 INFO L471 AbstractCegarLoop]: Abstraction has 18475 states and 55863 transitions. [2024-11-28 04:21:14,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 20 states have internal predecessors, (58), 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) [2024-11-28 04:21:14,874 INFO L276 IsEmpty]: Start isEmpty. Operand 18475 states and 55863 transitions. [2024-11-28 04:21:14,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-28 04:21:14,879 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:21:14,879 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-28 04:21:14,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 04:21:15,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:21:15,084 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:21:15,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:21:15,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1608770754, now seen corresponding path program 2 times [2024-11-28 04:21:15,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:21:15,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77005229] [2024-11-28 04:21:15,085 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:21:15,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:21:15,098 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:21:15,098 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:21:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:21:15,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:21:15,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77005229] [2024-11-28 04:21:15,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77005229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:21:15,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508747564] [2024-11-28 04:21:15,332 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:21:15,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:21:15,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:21:15,334 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:21:15,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:21:15,396 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:21:15,396 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:21:15,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 04:21:15,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:21:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:21:15,491 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:21:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:21:15,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508747564] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:21:15,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:21:15,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2024-11-28 04:21:15,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107962899] [2024-11-28 04:21:15,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:21:15,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 04:21:15,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:21:15,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 04:21:15,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:21:15,844 INFO L87 Difference]: Start difference. First operand 18475 states and 55863 transitions. Second operand has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:21:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:21:20,768 INFO L93 Difference]: Finished difference Result 26093 states and 77665 transitions. [2024-11-28 04:21:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 04:21:20,769 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2024-11-28 04:21:20,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:21:21,081 INFO L225 Difference]: With dead ends: 26093 [2024-11-28 04:21:21,081 INFO L226 Difference]: Without dead ends: 26092 [2024-11-28 04:21:21,106 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=573, Invalid=1497, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 04:21:21,107 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 676 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:21:21,108 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 441 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:21:21,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26092 states. [2024-11-28 04:21:26,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26092 to 25067. [2024-11-28 04:21:26,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25067 states, 16694 states have (on average 1.082844135617587) internal successors, (18077), 16909 states have internal predecessors, (18077), 4802 states have call successors, (4802), 714 states have call predecessors, (4802), 3566 states have return successors, (51688), 7443 states have call predecessors, (51688), 4653 states have call successors, (51688) [2024-11-28 04:21:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25067 states to 25067 states and 74567 transitions. [2024-11-28 04:21:26,850 INFO L78 Accepts]: Start accepts. Automaton has 25067 states and 74567 transitions. Word has length 59 [2024-11-28 04:21:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:21:26,851 INFO L471 AbstractCegarLoop]: Abstraction has 25067 states and 74567 transitions. [2024-11-28 04:21:26,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:21:26,851 INFO L276 IsEmpty]: Start isEmpty. Operand 25067 states and 74567 transitions. [2024-11-28 04:21:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-28 04:21:26,854 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:21:26,854 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:21:26,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 04:21:27,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 04:21:27,055 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:21:27,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:21:27,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1055434239, now seen corresponding path program 3 times [2024-11-28 04:21:27,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:21:27,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423458706] [2024-11-28 04:21:27,056 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:21:27,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:21:27,079 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 04:21:27,079 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:21:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-28 04:21:27,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:21:27,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423458706] [2024-11-28 04:21:27,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423458706] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:21:27,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:21:27,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:21:27,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643061817] [2024-11-28 04:21:27,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:21:27,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:21:27,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:21:27,138 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:21:27,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:21:27,138 INFO L87 Difference]: Start difference. First operand 25067 states and 74567 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:21:31,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:21:31,004 INFO L93 Difference]: Finished difference Result 25996 states and 77216 transitions. [2024-11-28 04:21:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:21:31,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2024-11-28 04:21:31,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:21:31,253 INFO L225 Difference]: With dead ends: 25996 [2024-11-28 04:21:31,253 INFO L226 Difference]: Without dead ends: 21293 [2024-11-28 04:21:31,299 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:21:31,302 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:21:31,303 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 54 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:21:31,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21293 states. [2024-11-28 04:21:36,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21293 to 21139. [2024-11-28 04:21:36,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21139 states, 13440 states have (on average 1.0405505952380953) internal successors, (13985), 13493 states have internal predecessors, (13985), 4411 states have call successors, (4411), 331 states have call predecessors, (4411), 3283 states have return successors, (51104), 7314 states have call predecessors, (51104), 4400 states have call successors, (51104) [2024-11-28 04:21:36,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21139 states to 21139 states and 69500 transitions. [2024-11-28 04:21:36,682 INFO L78 Accepts]: Start accepts. Automaton has 21139 states and 69500 transitions. Word has length 59 [2024-11-28 04:21:36,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:21:36,682 INFO L471 AbstractCegarLoop]: Abstraction has 21139 states and 69500 transitions. [2024-11-28 04:21:36,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:21:36,682 INFO L276 IsEmpty]: Start isEmpty. Operand 21139 states and 69500 transitions. [2024-11-28 04:21:36,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-28 04:21:36,688 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:21:36,688 INFO L218 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, 1] [2024-11-28 04:21:36,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-28 04:21:36,688 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-28 04:21:36,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:21:36,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1167651559, now seen corresponding path program 2 times [2024-11-28 04:21:36,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:21:36,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700103991] [2024-11-28 04:21:36,689 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:21:36,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:21:36,716 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:21:36,723 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:21:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 67 proven. 19 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-28 04:21:37,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:21:37,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700103991] [2024-11-28 04:21:37,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700103991] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:21:37,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976037807] [2024-11-28 04:21:37,144 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:21:37,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:21:37,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:21:37,146 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:21:37,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d4008b-f638-4ca8-b917-043a904618dc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 04:21:37,224 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:21:37,224 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:21:37,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 04:21:37,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:21:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-28 04:21:37,304 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:21:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-28 04:21:38,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976037807] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:21:38,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:21:38,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 31 [2024-11-28 04:21:38,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089173175] [2024-11-28 04:21:38,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:21:38,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 04:21:38,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:21:38,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 04:21:38,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:21:38,490 INFO L87 Difference]: Start difference. First operand 21139 states and 69500 transitions. Second operand has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 22 states have internal predecessors, (74), 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)