./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/busybox-1.22.0/date-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/busybox-1.22.0/date-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 00770410f857790135d9cb8dfb3c2639990bbc39be0fdf770345e3e040bd542d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:58:42,865 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:58:42,992 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-64bit-Automizer_Default.epf [2023-11-26 11:58:43,001 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:58:43,002 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:58:43,043 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:58:43,044 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:58:43,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:58:43,046 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:58:43,051 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:58:43,051 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:58:43,052 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:58:43,053 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:58:43,054 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:58:43,055 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:58:43,055 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:58:43,056 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:58:43,056 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:58:43,056 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:58:43,057 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:58:43,059 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:58:43,059 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:58:43,060 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-26 11:58:43,060 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:58:43,060 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:58:43,061 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:58:43,062 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:58:43,062 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:58:43,063 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:58:43,063 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:58:43,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:58:43,065 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:58:43,065 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:58:43,066 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:58:43,066 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:58:43,066 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:58:43,066 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:58:43,086 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:58:43,086 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:58:43,086 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:58:43,087 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:58:43,087 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00770410f857790135d9cb8dfb3c2639990bbc39be0fdf770345e3e040bd542d [2023-11-26 11:58:43,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:58:43,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:58:43,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:58:43,430 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:58:43,430 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:58:43,432 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/busybox-1.22.0/date-2.i [2023-11-26 11:58:46,685 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:58:47,169 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:58:47,170 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/sv-benchmarks/c/busybox-1.22.0/date-2.i [2023-11-26 11:58:47,225 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/data/f718199d6/59443882fa804cba9a1cd725b43b86fa/FLAGb90f99be8 [2023-11-26 11:58:47,243 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/data/f718199d6/59443882fa804cba9a1cd725b43b86fa [2023-11-26 11:58:47,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:58:47,247 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:58:47,249 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:58:47,249 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:58:47,260 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:58:47,261 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:58:47" (1/1) ... [2023-11-26 11:58:47,262 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5862386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:47, skipping insertion in model container [2023-11-26 11:58:47,263 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:58:47" (1/1) ... [2023-11-26 11:58:47,354 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:58:49,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:58:49,602 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:58:49,935 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:58:50,221 WARN L675 CHandler]: The function fflush is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:58:50,221 WARN L675 CHandler]: The function localtime is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:58:50,222 WARN L675 CHandler]: The function strerror is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:58:50,222 WARN L675 CHandler]: The function puts is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:58:50,222 WARN L675 CHandler]: The function strncmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:58:50,222 WARN L675 CHandler]: The function mktime is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:58:50,223 WARN L675 CHandler]: The function strftime is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:58:50,223 WARN L675 CHandler]: The function strspn is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:58:50,223 WARN L675 CHandler]: The function strrchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:58:50,224 WARN L675 CHandler]: The function strtoll is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:58:50,224 WARN L675 CHandler]: The function strtoul is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:58:50,225 WARN L675 CHandler]: The function time is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:58:50,233 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:58:50,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50 WrapperNode [2023-11-26 11:58:50,234 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:58:50,235 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:58:50,236 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:58:50,236 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:58:50,244 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:50,351 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:50,509 INFO L138 Inliner]: procedures = 649, calls = 918, calls flagged for inlining = 35, calls inlined = 34, statements flattened = 3058 [2023-11-26 11:58:50,509 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:58:50,510 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:58:50,510 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:58:50,511 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:58:50,522 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:50,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:50,543 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:50,564 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Memory array in LHS [2023-11-26 11:58:50,564 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:50,564 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:50,636 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:50,656 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:50,678 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:50,700 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:50,723 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:58:50,724 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:58:50,727 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:58:50,728 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:58:50,729 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:50,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:58:50,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:50,758 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:58:50,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:58:50,810 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2023-11-26 11:58:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure localtime [2023-11-26 11:58:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2023-11-26 11:58:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:58:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure strptime [2023-11-26 11:58:50,811 INFO L138 BoogieDeclarations]: Found implementation of procedure strptime [2023-11-26 11:58:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure ret_ERANGE [2023-11-26 11:58:50,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ret_ERANGE [2023-11-26 11:58:50,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-26 11:58:50,812 INFO L130 BoogieDeclarations]: Found specification of procedure bb_verror_msg [2023-11-26 11:58:50,812 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_verror_msg [2023-11-26 11:58:50,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-26 11:58:50,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-26 11:58:50,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-26 11:58:50,813 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-26 11:58:50,813 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-11-26 11:58:50,813 INFO L130 BoogieDeclarations]: Found specification of procedure maybe_set_utc [2023-11-26 11:58:50,813 INFO L138 BoogieDeclarations]: Found implementation of procedure maybe_set_utc [2023-11-26 11:58:50,814 INFO L130 BoogieDeclarations]: Found specification of procedure mktime [2023-11-26 11:58:50,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:58:50,814 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2023-11-26 11:58:50,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:58:50,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-26 11:58:50,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:58:50,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:58:50,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2023-11-26 11:58:50,815 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2023-11-26 11:58:50,815 INFO L130 BoogieDeclarations]: Found specification of procedure xmalloc [2023-11-26 11:58:50,815 INFO L138 BoogieDeclarations]: Found implementation of procedure xmalloc [2023-11-26 11:58:50,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-26 11:58:50,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-26 11:58:50,816 INFO L130 BoogieDeclarations]: Found specification of procedure stat [2023-11-26 11:58:50,816 INFO L138 BoogieDeclarations]: Found implementation of procedure stat [2023-11-26 11:58:50,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-26 11:58:50,816 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-26 11:58:50,816 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:58:50,817 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:58:50,817 INFO L130 BoogieDeclarations]: Found specification of procedure strftime [2023-11-26 11:58:50,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:58:50,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-26 11:58:50,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-26 11:58:50,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2023-11-26 11:58:50,818 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2023-11-26 11:58:50,818 INFO L130 BoogieDeclarations]: Found specification of procedure time [2023-11-26 11:58:50,818 INFO L130 BoogieDeclarations]: Found specification of procedure bb_show_usage [2023-11-26 11:58:50,818 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_show_usage [2023-11-26 11:58:50,818 INFO L130 BoogieDeclarations]: Found specification of procedure bb_ascii_isalnum [2023-11-26 11:58:50,818 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_ascii_isalnum [2023-11-26 11:58:50,819 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2023-11-26 11:58:50,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-26 11:58:50,819 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2023-11-26 11:58:50,819 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2023-11-26 11:58:50,819 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-11-26 11:58:50,819 INFO L130 BoogieDeclarations]: Found specification of procedure bb_error_msg_and_die [2023-11-26 11:58:50,820 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_error_msg_and_die [2023-11-26 11:58:50,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-26 11:58:51,467 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:58:51,471 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:58:55,642 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:58:55,762 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:58:55,762 INFO L309 CfgBuilder]: Removed 31 assume(true) statements. [2023-11-26 11:58:55,764 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:58:55 BoogieIcfgContainer [2023-11-26 11:58:55,764 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:58:55,769 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:58:55,769 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:58:55,773 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:58:55,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:58:47" (1/3) ... [2023-11-26 11:58:55,774 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd2d4a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:58:55, skipping insertion in model container [2023-11-26 11:58:55,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (2/3) ... [2023-11-26 11:58:55,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd2d4a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:58:55, skipping insertion in model container [2023-11-26 11:58:55,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:58:55" (3/3) ... [2023-11-26 11:58:55,780 INFO L112 eAbstractionObserver]: Analyzing ICFG date-2.i [2023-11-26 11:58:55,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:58:55,804 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 128 error locations. [2023-11-26 11:58:55,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:58:55,920 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@69f8f853, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:58:55,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 128 error locations. [2023-11-26 11:58:55,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 852 states, 644 states have (on average 1.718944099378882) internal successors, (1107), 775 states have internal predecessors, (1107), 65 states have call successors, (65), 14 states have call predecessors, (65), 14 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-26 11:58:55,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-26 11:58:55,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:55,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-26 11:58:55,949 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:58:55,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:55,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2601093, now seen corresponding path program 1 times [2023-11-26 11:58:55,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:55,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126198097] [2023-11-26 11:58:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:55,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:56,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:56,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126198097] [2023-11-26 11:58:56,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126198097] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:56,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:56,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:58:56,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418669262] [2023-11-26 11:58:56,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:56,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:56,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:56,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:56,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:56,774 INFO L87 Difference]: Start difference. First operand has 852 states, 644 states have (on average 1.718944099378882) internal successors, (1107), 775 states have internal predecessors, (1107), 65 states have call successors, (65), 14 states have call predecessors, (65), 14 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:57,204 INFO L93 Difference]: Finished difference Result 1685 states and 2501 transitions. [2023-11-26 11:58:57,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:57,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-26 11:58:57,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:57,226 INFO L225 Difference]: With dead ends: 1685 [2023-11-26 11:58:57,226 INFO L226 Difference]: Without dead ends: 832 [2023-11-26 11:58:57,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:57,239 INFO L413 NwaCegarLoop]: 1132 mSDtfsCounter, 1 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:57,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2260 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:58:57,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2023-11-26 11:58:57,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 832. [2023-11-26 11:58:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 630 states have (on average 1.6587301587301588) internal successors, (1045), 767 states have internal predecessors, (1045), 65 states have call successors, (65), 14 states have call predecessors, (65), 13 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-26 11:58:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1163 transitions. [2023-11-26 11:58:57,345 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1163 transitions. Word has length 3 [2023-11-26 11:58:57,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:57,346 INFO L495 AbstractCegarLoop]: Abstraction has 832 states and 1163 transitions. [2023-11-26 11:58:57,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:57,346 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1163 transitions. [2023-11-26 11:58:57,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-26 11:58:57,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:57,347 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-26 11:58:57,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:58:57,348 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:58:57,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:57,348 INFO L85 PathProgramCache]: Analyzing trace with hash 180251543, now seen corresponding path program 1 times [2023-11-26 11:58:57,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:57,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639276102] [2023-11-26 11:58:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:57,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:57,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:57,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639276102] [2023-11-26 11:58:57,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639276102] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:58:57,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622975615] [2023-11-26 11:58:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:57,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:57,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:57,571 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:57,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:58:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:58,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:58:58,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:58,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:58:58,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622975615] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:58,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:58:58,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-26 11:58:58,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923106630] [2023-11-26 11:58:58,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:58,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:58:58,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:58,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:58:58,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:58:58,121 INFO L87 Difference]: Start difference. First operand 832 states and 1163 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:58,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:58,523 INFO L93 Difference]: Finished difference Result 832 states and 1163 transitions. [2023-11-26 11:58:58,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:58:58,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-26 11:58:58,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:58,531 INFO L225 Difference]: With dead ends: 832 [2023-11-26 11:58:58,531 INFO L226 Difference]: Without dead ends: 831 [2023-11-26 11:58:58,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:58:58,534 INFO L413 NwaCegarLoop]: 1125 mSDtfsCounter, 5 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:58,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 2249 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:58:58,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2023-11-26 11:58:58,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 831. [2023-11-26 11:58:58,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 630 states have (on average 1.6571428571428573) internal successors, (1044), 766 states have internal predecessors, (1044), 65 states have call successors, (65), 14 states have call predecessors, (65), 13 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-26 11:58:58,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1162 transitions. [2023-11-26 11:58:58,584 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1162 transitions. Word has length 6 [2023-11-26 11:58:58,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:58,585 INFO L495 AbstractCegarLoop]: Abstraction has 831 states and 1162 transitions. [2023-11-26 11:58:58,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:58,585 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1162 transitions. [2023-11-26 11:58:58,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 11:58:58,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:58,586 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-11-26 11:58:58,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:58:58,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-26 11:58:58,795 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:58:58,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:58,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1292831042, now seen corresponding path program 1 times [2023-11-26 11:58:58,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:58,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266859116] [2023-11-26 11:58:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:58,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:58:58,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:58,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266859116] [2023-11-26 11:58:58,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266859116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:58,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:58,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:58:58,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252166111] [2023-11-26 11:58:58,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:58,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:58,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:58,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:58,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:58,945 INFO L87 Difference]: Start difference. First operand 831 states and 1162 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:59,141 INFO L93 Difference]: Finished difference Result 831 states and 1162 transitions. [2023-11-26 11:58:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:59,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-26 11:58:59,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:59,148 INFO L225 Difference]: With dead ends: 831 [2023-11-26 11:58:59,148 INFO L226 Difference]: Without dead ends: 830 [2023-11-26 11:58:59,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:59,150 INFO L413 NwaCegarLoop]: 1126 mSDtfsCounter, 0 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2250 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:59,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2250 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:58:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2023-11-26 11:58:59,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 828. [2023-11-26 11:58:59,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 628 states have (on average 1.6576433121019107) internal successors, (1041), 763 states have internal predecessors, (1041), 65 states have call successors, (65), 14 states have call predecessors, (65), 13 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-26 11:58:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1159 transitions. [2023-11-26 11:58:59,181 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1159 transitions. Word has length 7 [2023-11-26 11:58:59,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:59,182 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 1159 transitions. [2023-11-26 11:58:59,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:59,182 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1159 transitions. [2023-11-26 11:58:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 11:58:59,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:59,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:59,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:58:59,183 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:58:59,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:59,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1574033822, now seen corresponding path program 1 times [2023-11-26 11:58:59,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:59,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506925093] [2023-11-26 11:58:59,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:59,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:59,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 11:58:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:59,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:59,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506925093] [2023-11-26 11:58:59,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506925093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:58:59,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118225683] [2023-11-26 11:58:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:59,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:59,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:59,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:59,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:58:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:59,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:58:59,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:58:59,896 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:58:59,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118225683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:59,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:58:59,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-26 11:58:59,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315328250] [2023-11-26 11:58:59,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:59,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:59,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:59,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:59,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:58:59,899 INFO L87 Difference]: Start difference. First operand 828 states and 1159 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:00,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:00,194 INFO L93 Difference]: Finished difference Result 828 states and 1159 transitions. [2023-11-26 11:59:00,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:00,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-26 11:59:00,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:00,200 INFO L225 Difference]: With dead ends: 828 [2023-11-26 11:59:00,200 INFO L226 Difference]: Without dead ends: 826 [2023-11-26 11:59:00,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:00,202 INFO L413 NwaCegarLoop]: 1117 mSDtfsCounter, 823 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:00,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 1400 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:59:00,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2023-11-26 11:59:00,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2023-11-26 11:59:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 628 states have (on average 1.6544585987261147) internal successors, (1039), 761 states have internal predecessors, (1039), 65 states have call successors, (65), 14 states have call predecessors, (65), 13 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-26 11:59:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1157 transitions. [2023-11-26 11:59:00,236 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1157 transitions. Word has length 12 [2023-11-26 11:59:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:00,238 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1157 transitions. [2023-11-26 11:59:00,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1157 transitions. [2023-11-26 11:59:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 11:59:00,239 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:00,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:00,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:00,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:00,447 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:59:00,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:00,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1550407712, now seen corresponding path program 1 times [2023-11-26 11:59:00,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:00,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203840512] [2023-11-26 11:59:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:00,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:00,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 11:59:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:00,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:00,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203840512] [2023-11-26 11:59:00,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203840512] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:00,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54745754] [2023-11-26 11:59:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:00,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:00,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:00,665 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:00,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:59:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:01,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:59:01,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:01,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:01,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54745754] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:01,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:01,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-11-26 11:59:01,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168585099] [2023-11-26 11:59:01,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:01,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:59:01,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:01,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:59:01,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:59:01,157 INFO L87 Difference]: Start difference. First operand 826 states and 1157 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:59:01,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:01,437 INFO L93 Difference]: Finished difference Result 1656 states and 2320 transitions. [2023-11-26 11:59:01,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:59:01,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-11-26 11:59:01,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:01,445 INFO L225 Difference]: With dead ends: 1656 [2023-11-26 11:59:01,445 INFO L226 Difference]: Without dead ends: 835 [2023-11-26 11:59:01,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:59:01,449 INFO L413 NwaCegarLoop]: 1124 mSDtfsCounter, 4 mSDsluCounter, 2244 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3368 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:01,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3368 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:59:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2023-11-26 11:59:01,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 835. [2023-11-26 11:59:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 637 states have (on average 1.6452119309262165) internal successors, (1048), 770 states have internal predecessors, (1048), 65 states have call successors, (65), 14 states have call predecessors, (65), 13 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-26 11:59:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1166 transitions. [2023-11-26 11:59:01,490 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1166 transitions. Word has length 13 [2023-11-26 11:59:01,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:01,490 INFO L495 AbstractCegarLoop]: Abstraction has 835 states and 1166 transitions. [2023-11-26 11:59:01,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:59:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1166 transitions. [2023-11-26 11:59:01,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-26 11:59:01,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:01,492 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:01,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:01,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:01,700 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:59:01,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:01,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1911562830, now seen corresponding path program 2 times [2023-11-26 11:59:01,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:01,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295036390] [2023-11-26 11:59:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:01,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:02,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 11:59:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:02,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:02,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295036390] [2023-11-26 11:59:02,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295036390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:02,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303692737] [2023-11-26 11:59:02,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:59:02,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:02,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:02,152 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:02,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:59:02,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:59:02,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:59:02,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:59:02,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-26 11:59:02,667 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:02,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303692737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:02,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:59:02,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2023-11-26 11:59:02,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640923873] [2023-11-26 11:59:02,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:02,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:59:02,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:02,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:59:02,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:59:02,671 INFO L87 Difference]: Start difference. First operand 835 states and 1166 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:03,365 INFO L93 Difference]: Finished difference Result 835 states and 1166 transitions. [2023-11-26 11:59:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:59:03,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-26 11:59:03,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:03,371 INFO L225 Difference]: With dead ends: 835 [2023-11-26 11:59:03,371 INFO L226 Difference]: Without dead ends: 833 [2023-11-26 11:59:03,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:59:03,373 INFO L413 NwaCegarLoop]: 1092 mSDtfsCounter, 822 mSDsluCounter, 2401 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 3493 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:03,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 3493 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:59:03,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2023-11-26 11:59:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 833. [2023-11-26 11:59:03,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 637 states have (on average 1.642072213500785) internal successors, (1046), 768 states have internal predecessors, (1046), 65 states have call successors, (65), 14 states have call predecessors, (65), 13 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-26 11:59:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1164 transitions. [2023-11-26 11:59:03,410 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1164 transitions. Word has length 22 [2023-11-26 11:59:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:03,410 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 1164 transitions. [2023-11-26 11:59:03,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1164 transitions. [2023-11-26 11:59:03,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 11:59:03,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:03,412 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:03,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:03,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:03,631 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:59:03,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:03,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1332458269, now seen corresponding path program 1 times [2023-11-26 11:59:03,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:03,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906715480] [2023-11-26 11:59:03,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:03,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:03,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 11:59:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-26 11:59:03,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:03,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906715480] [2023-11-26 11:59:03,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906715480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:03,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:03,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:59:03,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222531262] [2023-11-26 11:59:03,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:03,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:03,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:03,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:03,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:03,910 INFO L87 Difference]: Start difference. First operand 833 states and 1164 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:04,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:04,234 INFO L93 Difference]: Finished difference Result 1649 states and 2312 transitions. [2023-11-26 11:59:04,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:04,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-11-26 11:59:04,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:04,241 INFO L225 Difference]: With dead ends: 1649 [2023-11-26 11:59:04,241 INFO L226 Difference]: Without dead ends: 836 [2023-11-26 11:59:04,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:04,244 INFO L413 NwaCegarLoop]: 1122 mSDtfsCounter, 1 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2239 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:04,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2239 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:59:04,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2023-11-26 11:59:04,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 836. [2023-11-26 11:59:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 640 states have (on average 1.6390625) internal successors, (1049), 771 states have internal predecessors, (1049), 65 states have call successors, (65), 14 states have call predecessors, (65), 13 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-26 11:59:04,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1167 transitions. [2023-11-26 11:59:04,279 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1167 transitions. Word has length 27 [2023-11-26 11:59:04,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:04,280 INFO L495 AbstractCegarLoop]: Abstraction has 836 states and 1167 transitions. [2023-11-26 11:59:04,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:04,281 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1167 transitions. [2023-11-26 11:59:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 11:59:04,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:04,282 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:04,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:59:04,283 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:59:04,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:04,283 INFO L85 PathProgramCache]: Analyzing trace with hash 590867711, now seen corresponding path program 1 times [2023-11-26 11:59:04,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:04,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061635699] [2023-11-26 11:59:04,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:04,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:04,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:04,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 11:59:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-26 11:59:04,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:04,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061635699] [2023-11-26 11:59:04,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061635699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:04,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:04,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:59:04,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185494777] [2023-11-26 11:59:04,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:04,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:04,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:04,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:04,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:04,558 INFO L87 Difference]: Start difference. First operand 836 states and 1167 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:04,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:04,943 INFO L93 Difference]: Finished difference Result 1110 states and 1580 transitions. [2023-11-26 11:59:04,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:04,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-11-26 11:59:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:04,952 INFO L225 Difference]: With dead ends: 1110 [2023-11-26 11:59:04,953 INFO L226 Difference]: Without dead ends: 1108 [2023-11-26 11:59:04,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:04,955 INFO L413 NwaCegarLoop]: 1117 mSDtfsCounter, 387 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 2226 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:04,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 2226 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:59:04,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2023-11-26 11:59:04,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 840. [2023-11-26 11:59:04,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 644 states have (on average 1.6366459627329193) internal successors, (1054), 775 states have internal predecessors, (1054), 65 states have call successors, (65), 14 states have call predecessors, (65), 13 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-26 11:59:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1172 transitions. [2023-11-26 11:59:04,998 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1172 transitions. Word has length 29 [2023-11-26 11:59:04,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:04,999 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 1172 transitions. [2023-11-26 11:59:04,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1172 transitions. [2023-11-26 11:59:05,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 11:59:05,000 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:05,001 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:05,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:59:05,001 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:59:05,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:05,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1177077217, now seen corresponding path program 1 times [2023-11-26 11:59:05,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:05,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281104391] [2023-11-26 11:59:05,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:05,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:05,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 11:59:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-26 11:59:05,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:05,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281104391] [2023-11-26 11:59:05,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281104391] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:05,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84129351] [2023-11-26 11:59:05,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:05,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:05,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:05,360 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:05,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:59:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:05,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:59:05,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:59:05,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:59:06,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84129351] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:06,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:06,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 7] total 14 [2023-11-26 11:59:06,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968222773] [2023-11-26 11:59:06,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:06,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:59:06,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:06,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:59:06,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:59:06,049 INFO L87 Difference]: Start difference. First operand 840 states and 1172 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:06,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:06,627 INFO L93 Difference]: Finished difference Result 1683 states and 2353 transitions. [2023-11-26 11:59:06,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:59:06,628 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-11-26 11:59:06,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:06,635 INFO L225 Difference]: With dead ends: 1683 [2023-11-26 11:59:06,635 INFO L226 Difference]: Without dead ends: 857 [2023-11-26 11:59:06,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:59:06,639 INFO L413 NwaCegarLoop]: 1116 mSDtfsCounter, 7 mSDsluCounter, 3342 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4458 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:06,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 4458 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:59:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2023-11-26 11:59:06,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 857. [2023-11-26 11:59:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 662 states have (on average 1.6178247734138973) internal successors, (1071), 792 states have internal predecessors, (1071), 65 states have call successors, (65), 14 states have call predecessors, (65), 13 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-26 11:59:06,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1189 transitions. [2023-11-26 11:59:06,680 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1189 transitions. Word has length 30 [2023-11-26 11:59:06,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:06,681 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1189 transitions. [2023-11-26 11:59:06,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:06,681 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1189 transitions. [2023-11-26 11:59:06,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-26 11:59:06,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:06,684 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:06,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:06,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:06,895 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:59:06,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:06,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1024445913, now seen corresponding path program 1 times [2023-11-26 11:59:06,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:06,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545683224] [2023-11-26 11:59:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:06,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:07,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 11:59:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2023-11-26 11:59:07,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:07,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545683224] [2023-11-26 11:59:07,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545683224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:07,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:07,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:59:07,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535015264] [2023-11-26 11:59:07,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:07,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:07,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:07,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:07,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:07,150 INFO L87 Difference]: Start difference. First operand 857 states and 1189 transitions. Second operand has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:07,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:07,482 INFO L93 Difference]: Finished difference Result 871 states and 1205 transitions. [2023-11-26 11:59:07,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:07,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2023-11-26 11:59:07,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:07,488 INFO L225 Difference]: With dead ends: 871 [2023-11-26 11:59:07,489 INFO L226 Difference]: Without dead ends: 869 [2023-11-26 11:59:07,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:07,490 INFO L413 NwaCegarLoop]: 1119 mSDtfsCounter, 3 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2234 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:07,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2234 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:59:07,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2023-11-26 11:59:07,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 867. [2023-11-26 11:59:07,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 672 states have (on average 1.6130952380952381) internal successors, (1084), 802 states have internal predecessors, (1084), 65 states have call successors, (65), 14 states have call predecessors, (65), 13 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-26 11:59:07,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1202 transitions. [2023-11-26 11:59:07,524 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1202 transitions. Word has length 49 [2023-11-26 11:59:07,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:07,524 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1202 transitions. [2023-11-26 11:59:07,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:07,525 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1202 transitions. [2023-11-26 11:59:07,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-26 11:59:07,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:07,526 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:07,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:59:07,527 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:59:07,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:07,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1024447642, now seen corresponding path program 1 times [2023-11-26 11:59:07,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:07,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648124664] [2023-11-26 11:59:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:07,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:07,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 11:59:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2023-11-26 11:59:07,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:07,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648124664] [2023-11-26 11:59:07,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648124664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:07,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:07,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:59:07,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356884178] [2023-11-26 11:59:07,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:07,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:07,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:07,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:07,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:07,733 INFO L87 Difference]: Start difference. First operand 867 states and 1202 transitions. Second operand has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:07,990 INFO L93 Difference]: Finished difference Result 867 states and 1202 transitions. [2023-11-26 11:59:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:07,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2023-11-26 11:59:07,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:07,997 INFO L225 Difference]: With dead ends: 867 [2023-11-26 11:59:07,997 INFO L226 Difference]: Without dead ends: 866 [2023-11-26 11:59:07,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:07,998 INFO L413 NwaCegarLoop]: 1120 mSDtfsCounter, 0 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:07,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2237 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:59:08,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2023-11-26 11:59:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 862. [2023-11-26 11:59:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 668 states have (on average 1.6137724550898203) internal successors, (1078), 797 states have internal predecessors, (1078), 65 states have call successors, (65), 14 states have call predecessors, (65), 13 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-26 11:59:08,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1196 transitions. [2023-11-26 11:59:08,033 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1196 transitions. Word has length 49 [2023-11-26 11:59:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:08,034 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1196 transitions. [2023-11-26 11:59:08,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:08,034 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1196 transitions. [2023-11-26 11:59:08,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-26 11:59:08,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:08,036 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:08,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:59:08,036 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:59:08,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:08,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1913575704, now seen corresponding path program 1 times [2023-11-26 11:59:08,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:08,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741010664] [2023-11-26 11:59:08,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:08,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:08,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 11:59:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-26 11:59:08,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:08,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741010664] [2023-11-26 11:59:08,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741010664] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:08,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192840426] [2023-11-26 11:59:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:08,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:08,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:08,314 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:08,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:59:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:08,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:59:08,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-26 11:59:09,006 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:09,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192840426] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:09,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:59:09,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-26 11:59:09,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21489715] [2023-11-26 11:59:09,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:09,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:59:09,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:09,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:59:09,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:09,009 INFO L87 Difference]: Start difference. First operand 862 states and 1196 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:09,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:09,388 INFO L93 Difference]: Finished difference Result 1134 states and 1608 transitions. [2023-11-26 11:59:09,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:59:09,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-11-26 11:59:09,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:09,397 INFO L225 Difference]: With dead ends: 1134 [2023-11-26 11:59:09,397 INFO L226 Difference]: Without dead ends: 1133 [2023-11-26 11:59:09,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:09,399 INFO L413 NwaCegarLoop]: 1506 mSDtfsCounter, 775 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 2620 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:09,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 2620 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:59:09,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2023-11-26 11:59:09,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 861. [2023-11-26 11:59:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 668 states have (on average 1.6122754491017963) internal successors, (1077), 796 states have internal predecessors, (1077), 65 states have call successors, (65), 14 states have call predecessors, (65), 13 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-26 11:59:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1195 transitions. [2023-11-26 11:59:09,441 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1195 transitions. Word has length 51 [2023-11-26 11:59:09,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:09,442 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1195 transitions. [2023-11-26 11:59:09,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1195 transitions. [2023-11-26 11:59:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-26 11:59:09,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:09,444 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:09,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:09,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:09,654 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:59:09,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:09,655 INFO L85 PathProgramCache]: Analyzing trace with hash -808694754, now seen corresponding path program 1 times [2023-11-26 11:59:09,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:09,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849049360] [2023-11-26 11:59:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:09,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:09,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 11:59:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-26 11:59:10,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:10,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849049360] [2023-11-26 11:59:10,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849049360] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:10,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680443507] [2023-11-26 11:59:10,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:10,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:10,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:10,036 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:10,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:59:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:10,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:59:10,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-26 11:59:10,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-26 11:59:10,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680443507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:10,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:10,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-26 11:59:10,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623296050] [2023-11-26 11:59:10,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:10,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:59:10,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:10,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:59:10,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:59:10,831 INFO L87 Difference]: Start difference. First operand 861 states and 1195 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:11,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:11,445 INFO L93 Difference]: Finished difference Result 1946 states and 2837 transitions. [2023-11-26 11:59:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:59:11,445 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-11-26 11:59:11,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:11,458 INFO L225 Difference]: With dead ends: 1946 [2023-11-26 11:59:11,458 INFO L226 Difference]: Without dead ends: 1945 [2023-11-26 11:59:11,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:59:11,460 INFO L413 NwaCegarLoop]: 1114 mSDtfsCounter, 2707 mSDsluCounter, 3326 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2739 SdHoareTripleChecker+Valid, 4440 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:11,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2739 Valid, 4440 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:59:11,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2023-11-26 11:59:11,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 873. [2023-11-26 11:59:11,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 680 states have (on average 1.6058823529411765) internal successors, (1092), 808 states have internal predecessors, (1092), 65 states have call successors, (65), 14 states have call predecessors, (65), 13 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-26 11:59:11,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1210 transitions. [2023-11-26 11:59:11,509 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1210 transitions. Word has length 52 [2023-11-26 11:59:11,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:11,510 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 1210 transitions. [2023-11-26 11:59:11,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:11,510 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1210 transitions. [2023-11-26 11:59:11,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-26 11:59:11,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:11,512 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:11,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:11,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:59:11,722 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:59:11,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:11,723 INFO L85 PathProgramCache]: Analyzing trace with hash -170987518, now seen corresponding path program 1 times [2023-11-26 11:59:11,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:11,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280136694] [2023-11-26 11:59:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:11,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:11,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 11:59:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-26 11:59:11,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:11,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280136694] [2023-11-26 11:59:11,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280136694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:11,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14287525] [2023-11-26 11:59:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:11,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:11,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:11,993 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:12,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:59:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:12,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:59:12,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-26 11:59:12,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-26 11:59:12,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14287525] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:12,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:12,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-26 11:59:12,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275615207] [2023-11-26 11:59:12,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:12,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:59:12,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:12,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:59:12,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:59:12,648 INFO L87 Difference]: Start difference. First operand 873 states and 1210 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:13,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:13,074 INFO L93 Difference]: Finished difference Result 1721 states and 2397 transitions. [2023-11-26 11:59:13,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:59:13,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-11-26 11:59:13,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:13,081 INFO L225 Difference]: With dead ends: 1721 [2023-11-26 11:59:13,081 INFO L226 Difference]: Without dead ends: 891 [2023-11-26 11:59:13,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:59:13,085 INFO L413 NwaCegarLoop]: 1119 mSDtfsCounter, 4 mSDsluCounter, 2232 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:13,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3351 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:59:13,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2023-11-26 11:59:13,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 891. [2023-11-26 11:59:13,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 698 states have (on average 1.5902578796561604) internal successors, (1110), 826 states have internal predecessors, (1110), 65 states have call successors, (65), 14 states have call predecessors, (65), 13 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-26 11:59:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1228 transitions. [2023-11-26 11:59:13,166 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1228 transitions. Word has length 57 [2023-11-26 11:59:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:13,167 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 1228 transitions. [2023-11-26 11:59:13,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:13,167 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1228 transitions. [2023-11-26 11:59:13,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-26 11:59:13,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:13,168 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:13,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:13,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:59:13,380 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:59:13,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:13,380 INFO L85 PathProgramCache]: Analyzing trace with hash 887538918, now seen corresponding path program 1 times [2023-11-26 11:59:13,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:13,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985766641] [2023-11-26 11:59:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:13,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:13,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 11:59:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:13,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-26 11:59:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-26 11:59:13,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:13,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985766641] [2023-11-26 11:59:13,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985766641] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:13,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:13,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:59:13,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822625524] [2023-11-26 11:59:13,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:13,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:59:13,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:13,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:59:13,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:59:13,751 INFO L87 Difference]: Start difference. First operand 891 states and 1228 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:15,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:59:18,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:18,439 INFO L93 Difference]: Finished difference Result 1815 states and 2537 transitions. [2023-11-26 11:59:18,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:59:18,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2023-11-26 11:59:18,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:18,447 INFO L225 Difference]: With dead ends: 1815 [2023-11-26 11:59:18,447 INFO L226 Difference]: Without dead ends: 1027 [2023-11-26 11:59:18,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:59:18,450 INFO L413 NwaCegarLoop]: 1084 mSDtfsCounter, 207 mSDsluCounter, 1698 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 2782 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:18,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 2782 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-26 11:59:18,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2023-11-26 11:59:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 931. [2023-11-26 11:59:18,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 737 states have (on average 1.5793758480325644) internal successors, (1164), 865 states have internal predecessors, (1164), 66 states have call successors, (66), 14 states have call predecessors, (66), 13 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-26 11:59:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1284 transitions. [2023-11-26 11:59:18,499 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1284 transitions. Word has length 60 [2023-11-26 11:59:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:18,499 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1284 transitions. [2023-11-26 11:59:18,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:18,500 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1284 transitions. [2023-11-26 11:59:18,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-26 11:59:18,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:18,501 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:18,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 11:59:18,502 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:59:18,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:18,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1773572213, now seen corresponding path program 1 times [2023-11-26 11:59:18,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:18,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126260196] [2023-11-26 11:59:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:18,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:18,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 11:59:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:18,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-26 11:59:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-26 11:59:18,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:18,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126260196] [2023-11-26 11:59:18,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126260196] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:18,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:18,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:59:18,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201517163] [2023-11-26 11:59:18,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:18,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:59:18,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:18,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:59:18,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:59:18,817 INFO L87 Difference]: Start difference. First operand 931 states and 1284 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:59:21,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:59:23,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:23,673 INFO L93 Difference]: Finished difference Result 974 states and 1340 transitions. [2023-11-26 11:59:23,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:59:23,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 62 [2023-11-26 11:59:23,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:23,681 INFO L225 Difference]: With dead ends: 974 [2023-11-26 11:59:23,681 INFO L226 Difference]: Without dead ends: 972 [2023-11-26 11:59:23,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:59:23,683 INFO L413 NwaCegarLoop]: 1086 mSDtfsCounter, 87 mSDsluCounter, 1763 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 2849 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:23,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 2849 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-26 11:59:23,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2023-11-26 11:59:23,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 931. [2023-11-26 11:59:23,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 737 states have (on average 1.5766621438263229) internal successors, (1162), 865 states have internal predecessors, (1162), 66 states have call successors, (66), 14 states have call predecessors, (66), 13 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-26 11:59:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1282 transitions. [2023-11-26 11:59:23,741 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1282 transitions. Word has length 62 [2023-11-26 11:59:23,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:23,741 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1282 transitions. [2023-11-26 11:59:23,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:59:23,742 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1282 transitions. [2023-11-26 11:59:23,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-26 11:59:23,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:23,743 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:23,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 11:59:23,743 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:59:23,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:23,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1017227021, now seen corresponding path program 2 times [2023-11-26 11:59:23,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:23,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526889271] [2023-11-26 11:59:23,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:23,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:24,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 11:59:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-26 11:59:24,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:24,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526889271] [2023-11-26 11:59:24,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526889271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:24,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349132030] [2023-11-26 11:59:24,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:59:24,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:24,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:24,270 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:24,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:59:24,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:59:24,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:59:24,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:59:24,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2023-11-26 11:59:25,077 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:25,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349132030] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:25,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:59:25,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-11-26 11:59:25,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173387237] [2023-11-26 11:59:25,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:25,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:59:25,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:25,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:59:25,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:59:25,080 INFO L87 Difference]: Start difference. First operand 931 states and 1282 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:25,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:25,993 INFO L93 Difference]: Finished difference Result 1788 states and 2484 transitions. [2023-11-26 11:59:25,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:59:25,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2023-11-26 11:59:25,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:26,000 INFO L225 Difference]: With dead ends: 1788 [2023-11-26 11:59:26,000 INFO L226 Difference]: Without dead ends: 931 [2023-11-26 11:59:26,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:59:26,003 INFO L413 NwaCegarLoop]: 1086 mSDtfsCounter, 823 mSDsluCounter, 3448 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 4534 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:26,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 4534 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 11:59:26,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-11-26 11:59:26,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 931. [2023-11-26 11:59:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 737 states have (on average 1.5753052917232022) internal successors, (1161), 865 states have internal predecessors, (1161), 66 states have call successors, (66), 14 states have call predecessors, (66), 13 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-26 11:59:26,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1281 transitions. [2023-11-26 11:59:26,050 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1281 transitions. Word has length 64 [2023-11-26 11:59:26,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:26,050 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1281 transitions. [2023-11-26 11:59:26,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:26,051 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1281 transitions. [2023-11-26 11:59:26,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-26 11:59:26,052 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:26,052 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:26,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:26,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 11:59:26,262 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:59:26,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:26,263 INFO L85 PathProgramCache]: Analyzing trace with hash 560589392, now seen corresponding path program 2 times [2023-11-26 11:59:26,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:26,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591339436] [2023-11-26 11:59:26,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:26,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:26,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 11:59:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-11-26 11:59:26,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:26,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591339436] [2023-11-26 11:59:26,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591339436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:26,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857139413] [2023-11-26 11:59:26,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:59:26,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:26,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:26,668 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:26,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:59:27,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:59:27,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:59:27,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:59:27,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2023-11-26 11:59:27,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2023-11-26 11:59:27,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857139413] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:27,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:27,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 7] total 14 [2023-11-26 11:59:27,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076028695] [2023-11-26 11:59:27,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:27,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:59:27,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:27,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:59:27,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:59:27,670 INFO L87 Difference]: Start difference. First operand 931 states and 1281 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:28,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:28,799 INFO L93 Difference]: Finished difference Result 1845 states and 2555 transitions. [2023-11-26 11:59:28,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 11:59:28,799 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-11-26 11:59:28,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:28,806 INFO L225 Difference]: With dead ends: 1845 [2023-11-26 11:59:28,806 INFO L226 Difference]: Without dead ends: 966 [2023-11-26 11:59:28,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=792, Unknown=0, NotChecked=0, Total=1122 [2023-11-26 11:59:28,810 INFO L413 NwaCegarLoop]: 1115 mSDtfsCounter, 11 mSDsluCounter, 6666 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7781 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:28,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 7781 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 11:59:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2023-11-26 11:59:28,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 966. [2023-11-26 11:59:28,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 773 states have (on average 1.5472186287192755) internal successors, (1196), 900 states have internal predecessors, (1196), 66 states have call successors, (66), 14 states have call predecessors, (66), 13 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-26 11:59:28,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1316 transitions. [2023-11-26 11:59:28,858 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1316 transitions. Word has length 75 [2023-11-26 11:59:28,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:28,858 INFO L495 AbstractCegarLoop]: Abstraction has 966 states and 1316 transitions. [2023-11-26 11:59:28,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1316 transitions. [2023-11-26 11:59:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-26 11:59:28,862 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:28,863 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:28,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:29,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 11:59:29,078 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:59:29,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:29,078 INFO L85 PathProgramCache]: Analyzing trace with hash -567088922, now seen corresponding path program 1 times [2023-11-26 11:59:29,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:29,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857222280] [2023-11-26 11:59:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:29,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:29,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 11:59:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2023-11-26 11:59:29,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:29,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857222280] [2023-11-26 11:59:29,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857222280] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:29,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937597242] [2023-11-26 11:59:29,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:29,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:29,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:29,588 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:29,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:59:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:30,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 1369 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:59:30,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2023-11-26 11:59:30,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2023-11-26 11:59:30,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937597242] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:30,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:30,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-26 11:59:30,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641364057] [2023-11-26 11:59:30,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:30,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:59:30,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:30,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:59:30,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:59:30,593 INFO L87 Difference]: Start difference. First operand 966 states and 1316 transitions. Second operand has 13 states, 12 states have (on average 5.75) internal successors, (69), 13 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:31,694 INFO L93 Difference]: Finished difference Result 4071 states and 5952 transitions. [2023-11-26 11:59:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:59:31,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.75) internal successors, (69), 13 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2023-11-26 11:59:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:31,720 INFO L225 Difference]: With dead ends: 4071 [2023-11-26 11:59:31,720 INFO L226 Difference]: Without dead ends: 4070 [2023-11-26 11:59:31,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:59:31,723 INFO L413 NwaCegarLoop]: 1113 mSDtfsCounter, 6128 mSDsluCounter, 7741 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6208 SdHoareTripleChecker+Valid, 8854 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:31,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6208 Valid, 8854 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 11:59:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4070 states. [2023-11-26 11:59:31,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4070 to 990. [2023-11-26 11:59:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 797 states have (on average 1.5382685069008784) internal successors, (1226), 924 states have internal predecessors, (1226), 66 states have call successors, (66), 14 states have call predecessors, (66), 13 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-26 11:59:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1346 transitions. [2023-11-26 11:59:31,813 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1346 transitions. Word has length 99 [2023-11-26 11:59:31,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:31,814 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 1346 transitions. [2023-11-26 11:59:31,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.75) internal successors, (69), 13 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:31,814 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1346 transitions. [2023-11-26 11:59:31,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-26 11:59:31,816 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:31,816 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:31,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:32,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8776078-f78d-4823-9e57-6eaa7a994f40/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:32,026 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_ascii_isalnumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_ascii_isalnumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 125 more)] === [2023-11-26 11:59:32,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:32,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1532074119, now seen corresponding path program 1 times [2023-11-26 11:59:32,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:32,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485426832] [2023-11-26 11:59:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:32,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:32,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 11:59:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:32,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-11-26 11:59:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2023-11-26 11:59:32,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:32,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485426832] [2023-11-26 11:59:32,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485426832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:32,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:32,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:59:32,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183087782] [2023-11-26 11:59:32,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:32,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:59:32,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:32,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:59:32,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:32,702 INFO L87 Difference]: Start difference. First operand 990 states and 1346 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)