./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/busybox-1.22.0/chroot-incomplete-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/busybox-1.22.0/chroot-incomplete-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2 --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 7fb5800c8758888815eae44b37eaf9bc49d0baa078e11009154801fa3e07455f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:26:44,854 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:26:44,963 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Overflow-64bit-Taipan_Default.epf [2024-11-02 12:26:44,972 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:26:44,973 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:26:45,016 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:26:45,018 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:26:45,019 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:26:45,020 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:26:45,021 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:26:45,022 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:26:45,022 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:26:45,024 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:26:45,024 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:26:45,026 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:26:45,027 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:26:45,027 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:26:45,027 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:26:45,028 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:26:45,028 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:26:45,028 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:26:45,033 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:26:45,033 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:26:45,034 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:26:45,034 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:26:45,034 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:26:45,035 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:26:45,035 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:26:45,035 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:26:45,035 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:26:45,036 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-02 12:26:45,036 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 12:26:45,036 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:26:45,036 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:26:45,038 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:26:45,039 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:26:45,039 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:26:45,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:26:45,040 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:26:45,040 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:26:45,040 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:26:45,040 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:26:45,041 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:26:45,041 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:26:45,041 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:26:45,042 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:26:45,042 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_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7fb5800c8758888815eae44b37eaf9bc49d0baa078e11009154801fa3e07455f [2024-11-02 12:26:45,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:26:45,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:26:45,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:26:45,344 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:26:45,345 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:26:45,347 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/busybox-1.22.0/chroot-incomplete-2.i Unable to find full path for "g++" [2024-11-02 12:26:47,490 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:26:47,923 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:26:47,925 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/sv-benchmarks/c/busybox-1.22.0/chroot-incomplete-2.i [2024-11-02 12:26:47,959 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/data/faf3db46a/20e607e320ce4d23a95eb4d1f2d59c8b/FLAG8bf369ffc [2024-11-02 12:26:47,977 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/data/faf3db46a/20e607e320ce4d23a95eb4d1f2d59c8b [2024-11-02 12:26:47,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:26:47,983 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:26:47,985 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:26:47,985 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:26:47,992 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:26:47,993 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:26:47" (1/1) ... [2024-11-02 12:26:47,996 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c7f2632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:47, skipping insertion in model container [2024-11-02 12:26:47,996 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:26:47" (1/1) ... [2024-11-02 12:26:48,087 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:26:49,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:26:49,744 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:26:49,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:26:50,225 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:26:50,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:50 WrapperNode [2024-11-02 12:26:50,230 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:26:50,231 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:26:50,231 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:26:50,231 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:26:50,253 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:50" (1/1) ... [2024-11-02 12:26:50,293 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:50" (1/1) ... [2024-11-02 12:26:50,379 INFO L138 Inliner]: procedures = 615, calls = 599, calls flagged for inlining = 25, calls inlined = 23, statements flattened = 1095 [2024-11-02 12:26:50,383 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:26:50,383 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:26:50,383 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:26:50,384 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:26:50,396 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:50" (1/1) ... [2024-11-02 12:26:50,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:50" (1/1) ... [2024-11-02 12:26:50,410 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:50" (1/1) ... [2024-11-02 12:26:50,411 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:50" (1/1) ... [2024-11-02 12:26:50,445 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:50" (1/1) ... [2024-11-02 12:26:50,451 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:50" (1/1) ... [2024-11-02 12:26:50,458 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:50" (1/1) ... [2024-11-02 12:26:50,464 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:50" (1/1) ... [2024-11-02 12:26:50,475 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:26:50,476 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:26:50,476 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:26:50,476 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:26:50,477 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:50" (1/1) ... [2024-11-02 12:26:50,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:26:50,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:26:50,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:26:50,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:26:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure execvp [2024-11-02 12:26:50,560 INFO L138 BoogieDeclarations]: Found implementation of procedure execvp [2024-11-02 12:26:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:26:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2024-11-02 12:26:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2024-11-02 12:26:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:26:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:26:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:26:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 12:26:50,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:26:50,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:26:50,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2024-11-02 12:26:50,565 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2024-11-02 12:26:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2024-11-02 12:26:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2024-11-02 12:26:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure bb_perror_msg_and_die [2024-11-02 12:26:50,565 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_perror_msg_and_die [2024-11-02 12:26:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-02 12:26:50,566 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-02 12:26:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:26:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 12:26:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-02 12:26:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:26:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:26:51,077 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:26:51,079 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:26:53,355 INFO L? ?]: Removed 292 outVars from TransFormulas that were not future-live. [2024-11-02 12:26:53,355 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:26:53,695 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:26:53,695 INFO L316 CfgBuilder]: Removed 11 assume(true) statements. [2024-11-02 12:26:53,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:26:53 BoogieIcfgContainer [2024-11-02 12:26:53,695 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:26:53,701 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:26:53,701 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:26:53,704 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:26:53,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:26:47" (1/3) ... [2024-11-02 12:26:53,706 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7d394b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:26:53, skipping insertion in model container [2024-11-02 12:26:53,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:50" (2/3) ... [2024-11-02 12:26:53,706 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7d394b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:26:53, skipping insertion in model container [2024-11-02 12:26:53,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:26:53" (3/3) ... [2024-11-02 12:26:53,708 INFO L112 eAbstractionObserver]: Analyzing ICFG chroot-incomplete-2.i [2024-11-02 12:26:53,725 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:26:53,726 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 35 error locations. [2024-11-02 12:26:53,799 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:26:53,806 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=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;@15a0321e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:26:53,806 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-02 12:26:53,811 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 112 states have (on average 1.6696428571428572) internal successors, (187), 149 states have internal predecessors, (187), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-02 12:26:53,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-02 12:26:53,818 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:26:53,818 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-02 12:26:53,819 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [execvpErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, execvpErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_perror_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2024-11-02 12:26:53,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:26:53,825 INFO L85 PathProgramCache]: Analyzing trace with hash 580307, now seen corresponding path program 1 times [2024-11-02 12:26:53,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:26:53,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687317168] [2024-11-02 12:26:53,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:26:53,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:26:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:26:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:26:54,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:26:54,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687317168] [2024-11-02 12:26:54,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687317168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:26:54,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:26:55,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-02 12:26:55,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402780215] [2024-11-02 12:26:55,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:26:55,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:26:55,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:26:55,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:26:55,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:26:55,037 INFO L87 Difference]: Start difference. First operand has 167 states, 112 states have (on average 1.6696428571428572) internal successors, (187), 149 states have internal predecessors, (187), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) 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) [2024-11-02 12:26:56,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:26:56,193 INFO L93 Difference]: Finished difference Result 319 states and 421 transitions. [2024-11-02 12:26:56,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:26:56,200 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 [2024-11-02 12:26:56,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:26:56,213 INFO L225 Difference]: With dead ends: 319 [2024-11-02 12:26:56,214 INFO L226 Difference]: Without dead ends: 153 [2024-11-02 12:26:56,222 INFO L431 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 [2024-11-02 12:26:56,230 INFO L432 NwaCegarLoop]: 167 mSDtfsCounter, 1 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:26:56,233 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 332 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-02 12:26:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-02 12:26:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2024-11-02 12:26:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 103 states have (on average 1.5825242718446602) internal successors, (163), 137 states have internal predecessors, (163), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-02 12:26:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 188 transitions. [2024-11-02 12:26:56,299 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 188 transitions. Word has length 3 [2024-11-02 12:26:56,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:26:56,300 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 188 transitions. [2024-11-02 12:26:56,300 INFO L472 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) [2024-11-02 12:26:56,300 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 188 transitions. [2024-11-02 12:26:56,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 12:26:56,301 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:26:56,301 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2024-11-02 12:26:56,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:26:56,302 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [execvpErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, execvpErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_perror_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2024-11-02 12:26:56,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:26:56,303 INFO L85 PathProgramCache]: Analyzing trace with hash 108414969, now seen corresponding path program 1 times [2024-11-02 12:26:56,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:26:56,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046432318] [2024-11-02 12:26:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:26:56,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:26:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:26:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:26:57,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:26:57,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046432318] [2024-11-02 12:26:57,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046432318] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:26:57,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273875087] [2024-11-02 12:26:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:26:57,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:26:57,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:26:57,127 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:26:57,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:26:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:26:57,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:26:57,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:26:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:26:58,037 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:26:58,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273875087] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:26:58,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:26:58,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2024-11-02 12:26:58,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264368645] [2024-11-02 12:26:58,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:26:58,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:26:58,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:26:58,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:26:58,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:26:58,041 INFO L87 Difference]: Start difference. First operand 153 states and 188 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) [2024-11-02 12:26:59,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:27:01,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:27:01,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:01,653 INFO L93 Difference]: Finished difference Result 153 states and 188 transitions. [2024-11-02 12:27:01,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:27:01,654 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 [2024-11-02 12:27:01,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:01,656 INFO L225 Difference]: With dead ends: 153 [2024-11-02 12:27:01,656 INFO L226 Difference]: Without dead ends: 152 [2024-11-02 12:27:01,657 INFO L431 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 [2024-11-02 12:27:01,658 INFO L432 NwaCegarLoop]: 162 mSDtfsCounter, 1 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:01,659 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 486 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-02 12:27:01,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-02 12:27:01,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2024-11-02 12:27:01,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 103 states have (on average 1.5728155339805825) internal successors, (162), 136 states have internal predecessors, (162), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-02 12:27:01,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 187 transitions. [2024-11-02 12:27:01,678 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 187 transitions. Word has length 6 [2024-11-02 12:27:01,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:01,678 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 187 transitions. [2024-11-02 12:27:01,679 INFO L472 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) [2024-11-02 12:27:01,679 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 187 transitions. [2024-11-02 12:27:01,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 12:27:01,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:01,682 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2024-11-02 12:27:01,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:27:01,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:01,883 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [execvpErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, execvpErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_perror_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2024-11-02 12:27:01,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:01,884 INFO L85 PathProgramCache]: Analyzing trace with hash -934102896, now seen corresponding path program 1 times [2024-11-02 12:27:01,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:01,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486450793] [2024-11-02 12:27:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:01,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:27:02,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:02,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486450793] [2024-11-02 12:27:02,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486450793] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:02,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:02,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:27:02,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500455466] [2024-11-02 12:27:02,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:02,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:27:02,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:02,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:27:02,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:27:02,403 INFO L87 Difference]: Start difference. First operand 152 states and 187 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) [2024-11-02 12:27:03,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:27:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:04,090 INFO L93 Difference]: Finished difference Result 152 states and 187 transitions. [2024-11-02 12:27:04,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:27:04,091 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 [2024-11-02 12:27:04,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:04,092 INFO L225 Difference]: With dead ends: 152 [2024-11-02 12:27:04,092 INFO L226 Difference]: Without dead ends: 151 [2024-11-02 12:27:04,093 INFO L431 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 [2024-11-02 12:27:04,102 INFO L432 NwaCegarLoop]: 162 mSDtfsCounter, 0 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:04,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 324 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-02 12:27:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-02 12:27:04,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2024-11-02 12:27:04,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 101 states have (on average 1.5742574257425743) internal successors, (159), 133 states have internal predecessors, (159), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-02 12:27:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 184 transitions. [2024-11-02 12:27:04,125 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 184 transitions. Word has length 7 [2024-11-02 12:27:04,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:04,125 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 184 transitions. [2024-11-02 12:27:04,125 INFO L472 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) [2024-11-02 12:27:04,133 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 184 transitions. [2024-11-02 12:27:04,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-02 12:27:04,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:04,133 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:04,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:27:04,134 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [execvpErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, execvpErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_perror_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2024-11-02 12:27:04,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:04,134 INFO L85 PathProgramCache]: Analyzing trace with hash 210627387, now seen corresponding path program 1 times [2024-11-02 12:27:04,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:04,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705757435] [2024-11-02 12:27:04,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:04,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:04,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:04,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705757435] [2024-11-02 12:27:04,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705757435] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:04,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462967877] [2024-11-02 12:27:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:04,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:04,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:04,858 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:04,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:27:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:05,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:27:05,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:27:05,605 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:27:05,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462967877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:05,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:27:05,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-11-02 12:27:05,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137590594] [2024-11-02 12:27:05,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:05,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:27:05,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:05,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:27:05,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:27:05,610 INFO L87 Difference]: Start difference. First operand 149 states and 184 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) [2024-11-02 12:27:07,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:27:07,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:07,455 INFO L93 Difference]: Finished difference Result 149 states and 184 transitions. [2024-11-02 12:27:07,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:27:07,456 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 [2024-11-02 12:27:07,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:07,457 INFO L225 Difference]: With dead ends: 149 [2024-11-02 12:27:07,458 INFO L226 Difference]: Without dead ends: 147 [2024-11-02 12:27:07,458 INFO L431 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 [2024-11-02 12:27:07,459 INFO L432 NwaCegarLoop]: 155 mSDtfsCounter, 59 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:07,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 259 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-02 12:27:07,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-02 12:27:07,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-11-02 12:27:07,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 101 states have (on average 1.5544554455445545) internal successors, (157), 131 states have internal predecessors, (157), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-02 12:27:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 182 transitions. [2024-11-02 12:27:07,473 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 182 transitions. Word has length 9 [2024-11-02 12:27:07,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:07,475 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 182 transitions. [2024-11-02 12:27:07,475 INFO L472 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) [2024-11-02 12:27:07,476 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 182 transitions. [2024-11-02 12:27:07,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 12:27:07,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:07,476 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:07,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:27:07,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:07,678 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [execvpErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, execvpErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_perror_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2024-11-02 12:27:07,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:07,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2060485225, now seen corresponding path program 1 times [2024-11-02 12:27:07,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:07,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395415154] [2024-11-02 12:27:07,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:07,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:08,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:08,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395415154] [2024-11-02 12:27:08,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395415154] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:08,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285508878] [2024-11-02 12:27:08,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:08,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:08,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:08,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:08,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9134f321-9cb5-4eda-8189-781276aa5baf/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:27:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:08,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:27:08,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:09,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:09,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285508878] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:27:09,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1940855785] [2024-11-02 12:27:09,102 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-02 12:27:09,102 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:27:09,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:27:09,117 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:27:09,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs