./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/busybox-1.22.0/expand-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/busybox-1.22.0/expand-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5 --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash aa9575a9d6782b3f681109b33c8859a1aefcf9cb32eb5af53f59cc43db765f1e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 18:58:55,069 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 18:58:55,203 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-21 18:58:55,214 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 18:58:55,215 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 18:58:55,258 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 18:58:55,259 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 18:58:55,260 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 18:58:55,261 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 18:58:55,266 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 18:58:55,267 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 18:58:55,268 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 18:58:55,268 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 18:58:55,270 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 18:58:55,270 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 18:58:55,271 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 18:58:55,271 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 18:58:55,272 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 18:58:55,272 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 18:58:55,273 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 18:58:55,273 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 18:58:55,274 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 18:58:55,275 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 18:58:55,276 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 18:58:55,276 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 18:58:55,277 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 18:58:55,277 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 18:58:55,277 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 18:58:55,278 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 18:58:55,278 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-21 18:58:55,280 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 18:58:55,280 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 18:58:55,280 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 18:58:55,281 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 18:58:55,281 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 18:58:55,281 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 18:58:55,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:58:55,282 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 18:58:55,282 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 18:58:55,282 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 18:58:55,283 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 18:58:55,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 18:58:55,283 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 18:58:55,284 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 18:58:55,284 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 18:58:55,285 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 18:58:55,285 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa9575a9d6782b3f681109b33c8859a1aefcf9cb32eb5af53f59cc43db765f1e [2023-11-21 18:58:55,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 18:58:55,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 18:58:55,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 18:58:55,732 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 18:58:55,734 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 18:58:55,735 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/busybox-1.22.0/expand-2.i [2023-11-21 18:58:59,352 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 18:58:59,904 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 18:58:59,905 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/sv-benchmarks/c/busybox-1.22.0/expand-2.i [2023-11-21 18:58:59,949 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/data/a72fa6251/1e216197d4b341408eee6dd76cbf6717/FLAG6fe56a41a [2023-11-21 18:58:59,970 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/data/a72fa6251/1e216197d4b341408eee6dd76cbf6717 [2023-11-21 18:58:59,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 18:58:59,977 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 18:58:59,980 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 18:58:59,981 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 18:58:59,986 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 18:58:59,987 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:58:59" (1/1) ... [2023-11-21 18:58:59,988 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d60cfd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:58:59, skipping insertion in model container [2023-11-21 18:58:59,988 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:58:59" (1/1) ... [2023-11-21 18:59:00,103 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 18:59:01,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:59:02,023 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 18:59:02,173 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:59:02,429 WARN L675 CHandler]: The function fflush is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 18:59:02,433 WARN L675 CHandler]: The function strerror is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 18:59:02,433 WARN L675 CHandler]: The function ferror is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 18:59:02,433 WARN L675 CHandler]: The function fopen is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 18:59:02,434 WARN L675 CHandler]: The function clearerr is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 18:59:02,434 WARN L675 CHandler]: The function strstr is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 18:59:02,434 WARN L675 CHandler]: The function fclose is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 18:59:02,434 WARN L675 CHandler]: The function putchar is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 18:59:02,435 WARN L675 CHandler]: The function strtoul is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 18:59:02,435 WARN L675 CHandler]: The function fputs is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 18:59:02,435 WARN L675 CHandler]: The function strcspn is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 18:59:02,435 WARN L675 CHandler]: The function fgetc is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 18:59:02,444 INFO L206 MainTranslator]: Completed translation [2023-11-21 18:59:02,445 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:02 WrapperNode [2023-11-21 18:59:02,445 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 18:59:02,446 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 18:59:02,446 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 18:59:02,447 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 18:59:02,455 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:02" (1/1) ... [2023-11-21 18:59:02,532 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:02" (1/1) ... [2023-11-21 18:59:02,680 INFO L138 Inliner]: procedures = 591, calls = 644, calls flagged for inlining = 37, calls inlined = 36, statements flattened = 2519 [2023-11-21 18:59:02,681 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 18:59:02,682 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 18:59:02,682 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 18:59:02,683 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 18:59:02,692 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:02" (1/1) ... [2023-11-21 18:59:02,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:02" (1/1) ... [2023-11-21 18:59:02,717 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:02" (1/1) ... [2023-11-21 18:59:02,718 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:02" (1/1) ... [2023-11-21 18:59:02,821 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:02" (1/1) ... [2023-11-21 18:59:02,853 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:02" (1/1) ... [2023-11-21 18:59:02,889 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:02" (1/1) ... [2023-11-21 18:59:02,908 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:02" (1/1) ... [2023-11-21 18:59:02,934 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 18:59:02,935 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 18:59:02,936 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 18:59:02,936 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 18:59:02,937 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:02" (1/1) ... [2023-11-21 18:59:02,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:59:02,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:02,973 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 18:59:02,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 18:59:03,021 INFO L130 BoogieDeclarations]: Found specification of procedure getopt32 [2023-11-21 18:59:03,021 INFO L138 BoogieDeclarations]: Found implementation of procedure getopt32 [2023-11-21 18:59:03,021 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2023-11-21 18:59:03,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_realloc [2023-11-21 18:59:03,021 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_realloc [2023-11-21 18:59:03,022 INFO L130 BoogieDeclarations]: Found specification of procedure xrealloc [2023-11-21 18:59:03,022 INFO L138 BoogieDeclarations]: Found implementation of procedure xrealloc [2023-11-21 18:59:03,022 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2023-11-21 18:59:03,023 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2023-11-21 18:59:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 18:59:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2023-11-21 18:59:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-21 18:59:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure bb_verror_msg [2023-11-21 18:59:03,084 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_verror_msg [2023-11-21 18:59:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2023-11-21 18:59:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-21 18:59:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 18:59:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 18:59:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2023-11-21 18:59:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2023-11-21 18:59:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 18:59:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 18:59:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 18:59:03,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 18:59:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-21 18:59:03,085 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-21 18:59:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2023-11-21 18:59:03,085 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2023-11-21 18:59:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure xmalloc [2023-11-21 18:59:03,086 INFO L138 BoogieDeclarations]: Found implementation of procedure xmalloc [2023-11-21 18:59:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-21 18:59:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-21 18:59:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure bb_simple_perror_msg [2023-11-21 18:59:03,086 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_simple_perror_msg [2023-11-21 18:59:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure bb_perror_msg_and_die [2023-11-21 18:59:03,086 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_perror_msg_and_die [2023-11-21 18:59:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2023-11-21 18:59:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-21 18:59:03,086 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-21 18:59:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 18:59:03,087 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 18:59:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 18:59:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 18:59:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2023-11-21 18:59:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 18:59:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2023-11-21 18:59:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure xatou_range [2023-11-21 18:59:03,087 INFO L138 BoogieDeclarations]: Found implementation of procedure xatou_range [2023-11-21 18:59:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure unicode_strwidth [2023-11-21 18:59:03,087 INFO L138 BoogieDeclarations]: Found implementation of procedure unicode_strwidth [2023-11-21 18:59:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 18:59:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure xmalloc_fgets [2023-11-21 18:59:03,088 INFO L138 BoogieDeclarations]: Found implementation of procedure xmalloc_fgets [2023-11-21 18:59:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2023-11-21 18:59:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-11-21 18:59:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure bb_error_msg_and_die [2023-11-21 18:59:03,088 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_error_msg_and_die [2023-11-21 18:59:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 18:59:03,673 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 18:59:03,678 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 18:59:06,001 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 18:59:07,020 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 18:59:07,021 INFO L308 CfgBuilder]: Removed 45 assume(true) statements. [2023-11-21 18:59:07,023 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:59:07 BoogieIcfgContainer [2023-11-21 18:59:07,023 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 18:59:07,026 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 18:59:07,026 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 18:59:07,030 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 18:59:07,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 06:58:59" (1/3) ... [2023-11-21 18:59:07,032 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d3c656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:59:07, skipping insertion in model container [2023-11-21 18:59:07,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:02" (2/3) ... [2023-11-21 18:59:07,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d3c656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:59:07, skipping insertion in model container [2023-11-21 18:59:07,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:59:07" (3/3) ... [2023-11-21 18:59:07,036 INFO L112 eAbstractionObserver]: Analyzing ICFG expand-2.i [2023-11-21 18:59:07,057 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 18:59:07,058 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 76 error locations. [2023-11-21 18:59:07,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 18:59:07,153 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=FINITE_AUTOMATA, 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;@60e68abd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 18:59:07,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 76 error locations. [2023-11-21 18:59:07,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 568 states, 433 states have (on average 1.672055427251732) internal successors, (724), 512 states have internal predecessors, (724), 45 states have call successors, (45), 15 states have call predecessors, (45), 15 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-21 18:59:07,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 18:59:07,171 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:07,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 18:59:07,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-21 18:59:07,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:07,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2538358, now seen corresponding path program 1 times [2023-11-21 18:59:07,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:07,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116975268] [2023-11-21 18:59:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:07,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:07,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:07,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116975268] [2023-11-21 18:59:07,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116975268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:07,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:07,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 18:59:07,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72703075] [2023-11-21 18:59:07,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:07,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:07,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:07,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:07,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:59:07,839 INFO L87 Difference]: Start difference. First operand has 568 states, 433 states have (on average 1.672055427251732) internal successors, (724), 512 states have internal predecessors, (724), 45 states have call successors, (45), 15 states have call predecessors, (45), 15 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) 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) [2023-11-21 18:59:08,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:08,329 INFO L93 Difference]: Finished difference Result 1126 states and 1647 transitions. [2023-11-21 18:59:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:08,331 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 [2023-11-21 18:59:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:08,345 INFO L225 Difference]: With dead ends: 1126 [2023-11-21 18:59:08,345 INFO L226 Difference]: Without dead ends: 554 [2023-11-21 18:59:08,354 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 [2023-11-21 18:59:08,357 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 1 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:08,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1302 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 18:59:08,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2023-11-21 18:59:08,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2023-11-21 18:59:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 425 states have (on average 1.5670588235294118) internal successors, (666), 507 states have internal predecessors, (666), 41 states have call successors, (41), 14 states have call predecessors, (41), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-21 18:59:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 740 transitions. [2023-11-21 18:59:08,434 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 740 transitions. Word has length 3 [2023-11-21 18:59:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:08,435 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 740 transitions. [2023-11-21 18:59:08,435 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) [2023-11-21 18:59:08,435 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 740 transitions. [2023-11-21 18:59:08,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 18:59:08,436 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:08,436 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-21 18:59:08,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 18:59:08,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-21 18:59:08,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:08,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1687323453, now seen corresponding path program 1 times [2023-11-21 18:59:08,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:08,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141832115] [2023-11-21 18:59:08,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:08,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:08,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:08,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141832115] [2023-11-21 18:59:08,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141832115] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:08,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556946608] [2023-11-21 18:59:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:08,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:08,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:08,639 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:08,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 18:59:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:09,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 18:59:09,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:09,195 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:09,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556946608] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:09,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 18:59:09,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-21 18:59:09,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568294745] [2023-11-21 18:59:09,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:09,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:09,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:09,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:09,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:09,199 INFO L87 Difference]: Start difference. First operand 554 states and 740 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) [2023-11-21 18:59:09,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:09,719 INFO L93 Difference]: Finished difference Result 554 states and 740 transitions. [2023-11-21 18:59:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:59:09,720 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 [2023-11-21 18:59:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:09,725 INFO L225 Difference]: With dead ends: 554 [2023-11-21 18:59:09,725 INFO L226 Difference]: Without dead ends: 553 [2023-11-21 18:59:09,726 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 [2023-11-21 18:59:09,727 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 2 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1920 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:09,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1920 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 18:59:09,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2023-11-21 18:59:09,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2023-11-21 18:59:09,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 425 states have (on average 1.5647058823529412) internal successors, (665), 506 states have internal predecessors, (665), 41 states have call successors, (41), 14 states have call predecessors, (41), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-21 18:59:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 739 transitions. [2023-11-21 18:59:09,758 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 739 transitions. Word has length 6 [2023-11-21 18:59:09,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:09,758 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 739 transitions. [2023-11-21 18:59:09,758 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) [2023-11-21 18:59:09,759 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 739 transitions. [2023-11-21 18:59:09,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 18:59:09,759 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:09,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-11-21 18:59:09,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:09,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:09,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-21 18:59:09,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:09,982 INFO L85 PathProgramCache]: Analyzing trace with hash -767417613, now seen corresponding path program 1 times [2023-11-21 18:59:09,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:09,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861858124] [2023-11-21 18:59:09,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:09,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:59:10,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:10,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861858124] [2023-11-21 18:59:10,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861858124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:10,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:10,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 18:59:10,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639532559] [2023-11-21 18:59:10,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:10,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:10,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:10,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:10,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:59:10,150 INFO L87 Difference]: Start difference. First operand 553 states and 739 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) [2023-11-21 18:59:10,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:10,548 INFO L93 Difference]: Finished difference Result 553 states and 739 transitions. [2023-11-21 18:59:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:10,549 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 [2023-11-21 18:59:10,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:10,553 INFO L225 Difference]: With dead ends: 553 [2023-11-21 18:59:10,553 INFO L226 Difference]: Without dead ends: 552 [2023-11-21 18:59:10,554 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 [2023-11-21 18:59:10,555 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 0 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:10,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1280 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 18:59:10,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2023-11-21 18:59:10,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 550. [2023-11-21 18:59:10,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 423 states have (on average 1.5650118203309693) internal successors, (662), 503 states have internal predecessors, (662), 41 states have call successors, (41), 14 states have call predecessors, (41), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-21 18:59:10,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 736 transitions. [2023-11-21 18:59:10,579 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 736 transitions. Word has length 7 [2023-11-21 18:59:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:10,579 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 736 transitions. [2023-11-21 18:59:10,580 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) [2023-11-21 18:59:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 736 transitions. [2023-11-21 18:59:10,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 18:59:10,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:10,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:10,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 18:59:10,581 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-21 18:59:10,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:10,582 INFO L85 PathProgramCache]: Analyzing trace with hash 2008290794, now seen corresponding path program 1 times [2023-11-21 18:59:10,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:10,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996071331] [2023-11-21 18:59:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:10,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:10,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:10,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996071331] [2023-11-21 18:59:10,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996071331] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:10,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895243712] [2023-11-21 18:59:10,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:10,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:10,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:10,800 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:10,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 18:59:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:11,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 18:59:11,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:59:11,202 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:11,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895243712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:11,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 18:59:11,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 18:59:11,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096608353] [2023-11-21 18:59:11,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:11,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:11,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:11,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:11,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:11,205 INFO L87 Difference]: Start difference. First operand 550 states and 736 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-11-21 18:59:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:11,588 INFO L93 Difference]: Finished difference Result 550 states and 736 transitions. [2023-11-21 18:59:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:11,589 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), 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 9 [2023-11-21 18:59:11,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:11,593 INFO L225 Difference]: With dead ends: 550 [2023-11-21 18:59:11,593 INFO L226 Difference]: Without dead ends: 548 [2023-11-21 18:59:11,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:11,595 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 107 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:11,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1167 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 18:59:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-11-21 18:59:11,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2023-11-21 18:59:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 423 states have (on average 1.5602836879432624) internal successors, (660), 501 states have internal predecessors, (660), 41 states have call successors, (41), 14 states have call predecessors, (41), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-21 18:59:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 734 transitions. [2023-11-21 18:59:11,617 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 734 transitions. Word has length 9 [2023-11-21 18:59:11,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:11,618 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 734 transitions. [2023-11-21 18:59:11,619 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), 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) [2023-11-21 18:59:11,619 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 734 transitions. [2023-11-21 18:59:11,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 18:59:11,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:11,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:11,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:11,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:11,836 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-21 18:59:11,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:11,836 INFO L85 PathProgramCache]: Analyzing trace with hash 2127474357, now seen corresponding path program 1 times [2023-11-21 18:59:11,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:11,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852714885] [2023-11-21 18:59:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:11,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:12,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:12,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852714885] [2023-11-21 18:59:12,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852714885] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:12,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469032599] [2023-11-21 18:59:12,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:12,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:12,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:12,072 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:12,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 18:59:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:12,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 18:59:12,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:12,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:12,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469032599] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:12,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [240101174] [2023-11-21 18:59:12,547 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-21 18:59:12,548 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:59:12,551 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:59:12,556 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:59:12,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:59:28,307 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 138 for LOIs [2023-11-21 18:59:28,366 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:59:30,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [240101174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:30,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:59:30,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 3, 4] total 13 [2023-11-21 18:59:30,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395668018] [2023-11-21 18:59:30,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:30,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 18:59:30,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 18:59:30,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-21 18:59:30,456 INFO L87 Difference]: Start difference. First operand 548 states and 734 transitions. Second operand has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) [2023-11-21 18:59:36,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:36,586 INFO L93 Difference]: Finished difference Result 550 states and 735 transitions. [2023-11-21 18:59:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 18:59:36,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 10 [2023-11-21 18:59:36,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:36,591 INFO L225 Difference]: With dead ends: 550 [2023-11-21 18:59:36,591 INFO L226 Difference]: Without dead ends: 548 [2023-11-21 18:59:36,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-21 18:59:36,593 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 4 mSDsluCounter, 2474 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3105 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:36,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3105 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-11-21 18:59:36,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-11-21 18:59:36,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2023-11-21 18:59:36,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 424 states have (on average 1.554245283018868) internal successors, (659), 500 states have internal predecessors, (659), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-21 18:59:36,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 733 transitions. [2023-11-21 18:59:36,622 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 733 transitions. Word has length 10 [2023-11-21 18:59:36,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:36,622 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 733 transitions. [2023-11-21 18:59:36,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) [2023-11-21 18:59:36,623 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 733 transitions. [2023-11-21 18:59:36,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 18:59:36,623 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:36,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:36,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:36,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:36,846 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-21 18:59:36,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:36,847 INFO L85 PathProgramCache]: Analyzing trace with hash 494864919, now seen corresponding path program 1 times [2023-11-21 18:59:36,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:36,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455559127] [2023-11-21 18:59:36,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:36,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:37,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:37,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455559127] [2023-11-21 18:59:37,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455559127] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:37,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324996817] [2023-11-21 18:59:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:37,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:37,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:37,122 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:37,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 18:59:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:37,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 18:59:37,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:59:37,548 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:37,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324996817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:37,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 18:59:37,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 18:59:37,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134170225] [2023-11-21 18:59:37,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:37,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:37,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:37,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:37,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:37,551 INFO L87 Difference]: Start difference. First operand 548 states and 733 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-11-21 18:59:37,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:37,937 INFO L93 Difference]: Finished difference Result 548 states and 733 transitions. [2023-11-21 18:59:37,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:37,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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 15 [2023-11-21 18:59:37,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:37,942 INFO L225 Difference]: With dead ends: 548 [2023-11-21 18:59:37,942 INFO L226 Difference]: Without dead ends: 547 [2023-11-21 18:59:37,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:37,947 INFO L413 NwaCegarLoop]: 634 mSDtfsCounter, 2 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:37,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1267 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 18:59:37,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-11-21 18:59:37,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2023-11-21 18:59:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 424 states have (on average 1.5518867924528301) internal successors, (658), 499 states have internal predecessors, (658), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-21 18:59:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 732 transitions. [2023-11-21 18:59:37,981 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 732 transitions. Word has length 15 [2023-11-21 18:59:37,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:37,982 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 732 transitions. [2023-11-21 18:59:37,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-11-21 18:59:37,982 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 732 transitions. [2023-11-21 18:59:37,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 18:59:37,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:37,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:38,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:38,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:38,199 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-21 18:59:38,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:38,200 INFO L85 PathProgramCache]: Analyzing trace with hash 494887775, now seen corresponding path program 1 times [2023-11-21 18:59:38,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:38,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633909480] [2023-11-21 18:59:38,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:38,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:38,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:38,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633909480] [2023-11-21 18:59:38,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633909480] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:38,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648166266] [2023-11-21 18:59:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:38,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:38,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:38,426 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:38,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 18:59:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:38,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 18:59:38,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:59:38,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:38,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648166266] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:38,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 18:59:38,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 18:59:38,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006431482] [2023-11-21 18:59:38,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:38,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:38,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:38,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:38,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:38,858 INFO L87 Difference]: Start difference. First operand 547 states and 732 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-11-21 18:59:39,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:39,234 INFO L93 Difference]: Finished difference Result 547 states and 732 transitions. [2023-11-21 18:59:39,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:39,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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 15 [2023-11-21 18:59:39,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:39,239 INFO L225 Difference]: With dead ends: 547 [2023-11-21 18:59:39,239 INFO L226 Difference]: Without dead ends: 546 [2023-11-21 18:59:39,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:39,241 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 6 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:39,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1260 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 18:59:39,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-11-21 18:59:39,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2023-11-21 18:59:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 424 states have (on average 1.5495283018867925) internal successors, (657), 498 states have internal predecessors, (657), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-21 18:59:39,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 731 transitions. [2023-11-21 18:59:39,266 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 731 transitions. Word has length 15 [2023-11-21 18:59:39,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:39,267 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 731 transitions. [2023-11-21 18:59:39,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-11-21 18:59:39,267 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 731 transitions. [2023-11-21 18:59:39,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 18:59:39,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:39,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:39,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-21 18:59:39,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:39,490 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-21 18:59:39,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:39,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1839054783, now seen corresponding path program 1 times [2023-11-21 18:59:39,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:39,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484936779] [2023-11-21 18:59:39,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:39,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:39,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:39,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484936779] [2023-11-21 18:59:39,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484936779] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:39,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858344391] [2023-11-21 18:59:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:39,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:39,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:39,682 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:39,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 18:59:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:40,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 18:59:40,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:59:40,114 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:40,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858344391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:40,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 18:59:40,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 18:59:40,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862946705] [2023-11-21 18:59:40,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:40,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:40,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:40,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:40,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:40,116 INFO L87 Difference]: Start difference. First operand 546 states and 731 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-11-21 18:59:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:40,532 INFO L93 Difference]: Finished difference Result 1083 states and 1454 transitions. [2023-11-21 18:59:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:40,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 16 [2023-11-21 18:59:40,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:40,537 INFO L225 Difference]: With dead ends: 1083 [2023-11-21 18:59:40,537 INFO L226 Difference]: Without dead ends: 549 [2023-11-21 18:59:40,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:40,540 INFO L413 NwaCegarLoop]: 634 mSDtfsCounter, 0 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:40,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1266 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 18:59:40,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2023-11-21 18:59:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2023-11-21 18:59:40,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 427 states have (on average 1.5456674473067915) internal successors, (660), 501 states have internal predecessors, (660), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-21 18:59:40,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 734 transitions. [2023-11-21 18:59:40,566 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 734 transitions. Word has length 16 [2023-11-21 18:59:40,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:40,567 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 734 transitions. [2023-11-21 18:59:40,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-11-21 18:59:40,567 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 734 transitions. [2023-11-21 18:59:40,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 18:59:40,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:40,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:40,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:40,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:40,782 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting getopt32Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-21 18:59:40,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:40,783 INFO L85 PathProgramCache]: Analyzing trace with hash -797241480, now seen corresponding path program 1 times [2023-11-21 18:59:40,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:40,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206667346] [2023-11-21 18:59:40,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:40,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:40,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:40,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206667346] [2023-11-21 18:59:40,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206667346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:40,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810649959] [2023-11-21 18:59:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:40,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:40,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:40,976 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:41,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 18:59:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:41,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 18:59:41,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:59:41,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:41,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810649959] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:41,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 18:59:41,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 18:59:41,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442733692] [2023-11-21 18:59:41,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:41,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:41,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:41,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:41,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:41,447 INFO L87 Difference]: Start difference. First operand 549 states and 734 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, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 18:59:41,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:41,837 INFO L93 Difference]: Finished difference Result 552 states and 738 transitions. [2023-11-21 18:59:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:41,838 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, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-21 18:59:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:41,843 INFO L225 Difference]: With dead ends: 552 [2023-11-21 18:59:41,843 INFO L226 Difference]: Without dead ends: 551 [2023-11-21 18:59:41,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:41,845 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 227 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:41,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1056 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 18:59:41,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-11-21 18:59:41,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 548. [2023-11-21 18:59:41,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 427 states have (on average 1.5433255269320842) internal successors, (659), 500 states have internal predecessors, (659), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-21 18:59:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 733 transitions. [2023-11-21 18:59:41,870 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 733 transitions. Word has length 19 [2023-11-21 18:59:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:41,871 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 733 transitions. [2023-11-21 18:59:41,871 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, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 18:59:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 733 transitions. [2023-11-21 18:59:41,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-21 18:59:41,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:41,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:41,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:42,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:42,086 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting getopt32Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-21 18:59:42,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:42,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1055318499, now seen corresponding path program 1 times [2023-11-21 18:59:42,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:42,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048471265] [2023-11-21 18:59:42,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:42,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:42,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:42,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048471265] [2023-11-21 18:59:42,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048471265] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:42,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437839174] [2023-11-21 18:59:42,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:42,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:42,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:42,289 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:42,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 18:59:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:42,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 18:59:42,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:59:42,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:42,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437839174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:42,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 18:59:42,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 18:59:42,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924859315] [2023-11-21 18:59:42,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:42,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:42,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:42,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:42,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:42,784 INFO L87 Difference]: Start difference. First operand 548 states and 733 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 18:59:43,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:43,222 INFO L93 Difference]: Finished difference Result 727 states and 983 transitions. [2023-11-21 18:59:43,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:43,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-21 18:59:43,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:43,228 INFO L225 Difference]: With dead ends: 727 [2023-11-21 18:59:43,228 INFO L226 Difference]: Without dead ends: 726 [2023-11-21 18:59:43,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:43,230 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 225 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:43,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1252 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 18:59:43,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2023-11-21 18:59:43,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 552. [2023-11-21 18:59:43,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 431 states have (on average 1.5406032482598608) internal successors, (664), 504 states have internal predecessors, (664), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-21 18:59:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 738 transitions. [2023-11-21 18:59:43,259 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 738 transitions. Word has length 20 [2023-11-21 18:59:43,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:43,259 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 738 transitions. [2023-11-21 18:59:43,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 18:59:43,259 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 738 transitions. [2023-11-21 18:59:43,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 18:59:43,260 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:43,260 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:43,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:43,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:43,488 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-21 18:59:43,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:43,489 INFO L85 PathProgramCache]: Analyzing trace with hash -676318828, now seen corresponding path program 1 times [2023-11-21 18:59:43,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:43,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086139418] [2023-11-21 18:59:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:43,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 18:59:43,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:43,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086139418] [2023-11-21 18:59:43,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086139418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:43,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685785028] [2023-11-21 18:59:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:43,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:43,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:43,662 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:43,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 18:59:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:44,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 18:59:44,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 18:59:44,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:44,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685785028] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:44,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 18:59:44,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 18:59:44,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079171138] [2023-11-21 18:59:44,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:44,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:44,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:44,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:44,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:44,138 INFO L87 Difference]: Start difference. First operand 552 states and 738 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-11-21 18:59:44,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:44,509 INFO L93 Difference]: Finished difference Result 552 states and 738 transitions. [2023-11-21 18:59:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:44,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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 19 [2023-11-21 18:59:44,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:44,514 INFO L225 Difference]: With dead ends: 552 [2023-11-21 18:59:44,514 INFO L226 Difference]: Without dead ends: 551 [2023-11-21 18:59:44,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:44,515 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 0 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:44,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1263 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 18:59:44,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-11-21 18:59:44,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 549. [2023-11-21 18:59:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 429 states have (on average 1.5407925407925407) internal successors, (661), 501 states have internal predecessors, (661), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-21 18:59:44,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 735 transitions. [2023-11-21 18:59:44,541 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 735 transitions. Word has length 19 [2023-11-21 18:59:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:44,542 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 735 transitions. [2023-11-21 18:59:44,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-11-21 18:59:44,542 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 735 transitions. [2023-11-21 18:59:44,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 18:59:44,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:44,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:44,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:44,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:44,765 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-21 18:59:44,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:44,765 INFO L85 PathProgramCache]: Analyzing trace with hash -675610283, now seen corresponding path program 1 times [2023-11-21 18:59:44,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:44,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278220874] [2023-11-21 18:59:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:44,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:59:44,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:44,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278220874] [2023-11-21 18:59:44,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278220874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:44,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808758409] [2023-11-21 18:59:44,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:44,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:44,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:44,940 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:44,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 18:59:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:45,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 18:59:45,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 18:59:45,405 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:45,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808758409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:45,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 18:59:45,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 18:59:45,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484429779] [2023-11-21 18:59:45,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:45,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:45,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:45,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:45,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:45,407 INFO L87 Difference]: Start difference. First operand 549 states and 735 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-11-21 18:59:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:45,795 INFO L93 Difference]: Finished difference Result 557 states and 745 transitions. [2023-11-21 18:59:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:45,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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 19 [2023-11-21 18:59:45,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:45,799 INFO L225 Difference]: With dead ends: 557 [2023-11-21 18:59:45,799 INFO L226 Difference]: Without dead ends: 556 [2023-11-21 18:59:45,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:45,801 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 0 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:45,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1260 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 18:59:45,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2023-11-21 18:59:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2023-11-21 18:59:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 436 states have (on average 1.536697247706422) internal successors, (670), 508 states have internal predecessors, (670), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-21 18:59:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 744 transitions. [2023-11-21 18:59:45,826 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 744 transitions. Word has length 19 [2023-11-21 18:59:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:45,827 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 744 transitions. [2023-11-21 18:59:45,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-11-21 18:59:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 744 transitions. [2023-11-21 18:59:45,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 18:59:45,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:45,828 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:45,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:46,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 18:59:46,043 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting getopt32Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [unicode_strwidthErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, unicode_strwidthErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2023-11-21 18:59:46,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:46,044 INFO L85 PathProgramCache]: Analyzing trace with hash -870066070, now seen corresponding path program 1 times [2023-11-21 18:59:46,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:46,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183250234] [2023-11-21 18:59:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:46,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 18:59:46,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:46,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183250234] [2023-11-21 18:59:46,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183250234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:46,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945337929] [2023-11-21 18:59:46,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:46,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:46,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:46,232 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:46,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd882f70-9636-4092-9e3d-554fc5771d85/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 18:59:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:46,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 18:59:46,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 18:59:46,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 18:59:46,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945337929] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:46,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2145196205] [2023-11-21 18:59:46,767 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-21 18:59:46,767 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:59:46,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:59:46,768 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:59:46,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs