./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/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_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9e3997a2a1cd8cbe038fe2c0a5bc044283ed06667aa7ef42f046d1134291f84e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:39:44,118 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:39:44,217 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:39:44,225 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:39:44,226 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:39:44,261 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:39:44,262 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:39:44,263 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:39:44,264 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:39:44,265 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:39:44,267 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:39:44,267 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:39:44,268 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:39:44,268 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:39:44,268 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:39:44,269 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:39:44,269 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:39:44,273 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:39:44,274 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:39:44,274 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:39:44,274 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:39:44,275 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:39:44,275 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:39:44,276 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:39:44,276 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:39:44,276 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:39:44,277 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:39:44,277 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:39:44,277 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:39:44,277 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:39:44,278 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:39:44,278 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:39:44,281 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:39:44,281 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:39:44,282 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:39:44,282 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:39:44,282 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:39:44,283 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:39:44,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:39:44,283 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:39:44,283 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:39:44,284 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:39:44,285 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:39:44,285 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:39:44,285 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:39:44,286 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:39:44,286 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:39:44,286 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_c3306431-823e-47bf-a3ba-bfe6f8e7722c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e3997a2a1cd8cbe038fe2c0a5bc044283ed06667aa7ef42f046d1134291f84e [2024-11-02 12:39:44,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:39:44,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:39:44,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:39:44,628 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:39:44,629 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:39:44,630 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i Unable to find full path for "g++" [2024-11-02 12:39:46,970 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:39:47,174 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:39:47,174 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i [2024-11-02 12:39:47,186 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/data/5a92e2ffa/94c245e5dba0443291bb0dd7e4a4f2f9/FLAG6a83f02b2 [2024-11-02 12:39:47,200 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/data/5a92e2ffa/94c245e5dba0443291bb0dd7e4a4f2f9 [2024-11-02 12:39:47,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:39:47,205 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:39:47,206 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:39:47,207 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:39:47,215 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:39:47,216 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:39:47" (1/1) ... [2024-11-02 12:39:47,217 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e09006e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:47, skipping insertion in model container [2024-11-02 12:39:47,218 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:39:47" (1/1) ... [2024-11-02 12:39:47,246 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:39:47,437 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i[821,834] [2024-11-02 12:39:47,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:39:47,469 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:39:47,487 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i[821,834] [2024-11-02 12:39:47,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:39:47,518 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:39:47,519 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:47 WrapperNode [2024-11-02 12:39:47,519 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:39:47,520 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:39:47,520 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:39:47,521 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:39:47,529 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:47" (1/1) ... [2024-11-02 12:39:47,544 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:47" (1/1) ... [2024-11-02 12:39:47,569 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2024-11-02 12:39:47,569 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:39:47,570 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:39:47,570 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:39:47,570 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:39:47,580 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:47" (1/1) ... [2024-11-02 12:39:47,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:47" (1/1) ... [2024-11-02 12:39:47,582 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:47" (1/1) ... [2024-11-02 12:39:47,583 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:47" (1/1) ... [2024-11-02 12:39:47,588 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:47" (1/1) ... [2024-11-02 12:39:47,592 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:47" (1/1) ... [2024-11-02 12:39:47,593 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:47" (1/1) ... [2024-11-02 12:39:47,594 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:47" (1/1) ... [2024-11-02 12:39:47,596 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:39:47,597 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:39:47,598 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:39:47,598 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:39:47,599 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:47" (1/1) ... [2024-11-02 12:39:47,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:39:47,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:47,632 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:39:47,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:39:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:39:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:39:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:39:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:39:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:39:47,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:39:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:39:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:39:47,755 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:39:47,758 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:39:48,019 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-02 12:39:48,019 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:39:48,106 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:39:48,106 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-02 12:39:48,107 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:39:48 BoogieIcfgContainer [2024-11-02 12:39:48,107 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:39:48,111 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:39:48,111 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:39:48,117 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:39:48,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:39:47" (1/3) ... [2024-11-02 12:39:48,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b36edcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:39:48, skipping insertion in model container [2024-11-02 12:39:48,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:47" (2/3) ... [2024-11-02 12:39:48,120 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b36edcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:39:48, skipping insertion in model container [2024-11-02 12:39:48,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:39:48" (3/3) ... [2024-11-02 12:39:48,121 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum3_ground.i [2024-11-02 12:39:48,142 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:39:48,142 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:39:48,217 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:39:48,225 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;@2448284, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:39:48,226 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:39:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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 12:39:48,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-02 12:39:48,238 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:48,239 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:39:48,240 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:48,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:48,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1610783716, now seen corresponding path program 1 times [2024-11-02 12:39:48,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:48,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764039689] [2024-11-02 12:39:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:48,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:48,555 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 12:39:48,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:48,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764039689] [2024-11-02 12:39:48,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764039689] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:39:48,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:39:48,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:39:48,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307862925] [2024-11-02 12:39:48,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:39:48,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:39:48,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:48,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:39:48,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:39:48,593 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12:39:48,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:39:48,681 INFO L93 Difference]: Finished difference Result 24 states and 37 transitions. [2024-11-02 12:39:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:39:48,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2024-11-02 12:39:48,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:39:48,690 INFO L225 Difference]: With dead ends: 24 [2024-11-02 12:39:48,690 INFO L226 Difference]: Without dead ends: 14 [2024-11-02 12:39:48,693 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 12:39:48,699 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:39:48,707 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:39:48,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-02 12:39:48,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-02 12:39:48,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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 12:39:48,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2024-11-02 12:39:48,766 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2024-11-02 12:39:48,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:39:48,767 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2024-11-02 12:39:48,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12:39:48,768 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2024-11-02 12:39:48,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 12:39:48,773 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:48,773 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:39:48,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:39:48,774 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:48,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:48,775 INFO L85 PathProgramCache]: Analyzing trace with hash -861526655, now seen corresponding path program 1 times [2024-11-02 12:39:48,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:48,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578688047] [2024-11-02 12:39:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:48,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:48,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:39:48,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:48,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578688047] [2024-11-02 12:39:48,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578688047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:39:48,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862171377] [2024-11-02 12:39:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:48,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:48,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:48,998 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:39:49,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:39:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:49,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:39:49,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:39:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:39:49,167 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:39:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:39:49,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862171377] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:39:49,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [396405533] [2024-11-02 12:39:49,231 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-02 12:39:49,231 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:39:49,236 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:39:49,243 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:39:49,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:39:49,951 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:39:50,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) 0)) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-02 12:39:50,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:39:50,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:39:50,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-02 12:39:50,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717794215] [2024-11-02 12:39:50,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:39:50,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:39:50,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:50,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:39:50,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:39:50,149 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 12:39:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:39:50,243 INFO L93 Difference]: Finished difference Result 37 states and 56 transitions. [2024-11-02 12:39:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:39:50,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 12 [2024-11-02 12:39:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:39:50,245 INFO L225 Difference]: With dead ends: 37 [2024-11-02 12:39:50,245 INFO L226 Difference]: Without dead ends: 26 [2024-11-02 12:39:50,245 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:39:50,247 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:39:50,248 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:39:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-02 12:39:50,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-02 12:39:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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 12:39:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-02 12:39:50,254 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 12 [2024-11-02 12:39:50,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:39:50,255 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-02 12:39:50,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 12:39:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-02 12:39:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 12:39:50,256 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:50,256 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:39:50,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:39:50,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-02 12:39:50,457 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:50,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:50,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1943060644, now seen corresponding path program 2 times [2024-11-02 12:39:50,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:50,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913856403] [2024-11-02 12:39:50,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:50,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-02 12:39:50,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:50,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913856403] [2024-11-02 12:39:50,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913856403] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:39:50,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349310519] [2024-11-02 12:39:50,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:39:50,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:50,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:50,872 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:39:50,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:39:51,018 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 12:39:51,019 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:39:51,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 12:39:51,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:39:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-02 12:39:51,067 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:39:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-02 12:39:51,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349310519] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:39:51,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [306336170] [2024-11-02 12:39:51,173 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-02 12:39:51,176 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:39:51,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:39:51,177 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:39:51,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:39:51,530 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:39:51,874 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '419#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) 0)) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-02 12:39:51,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:39:51,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:39:51,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2024-11-02 12:39:51,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482354712] [2024-11-02 12:39:51,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:39:51,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-02 12:39:51,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:51,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-02 12:39:51,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:39:51,878 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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 12:39:52,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:39:52,055 INFO L93 Difference]: Finished difference Result 70 states and 101 transitions. [2024-11-02 12:39:52,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 12:39:52,056 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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 24 [2024-11-02 12:39:52,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:39:52,056 INFO L225 Difference]: With dead ends: 70 [2024-11-02 12:39:52,057 INFO L226 Difference]: Without dead ends: 50 [2024-11-02 12:39:52,058 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 15 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:39:52,061 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:39:52,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:39:52,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-02 12:39:52,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-02 12:39:52,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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 12:39:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-11-02 12:39:52,076 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 24 [2024-11-02 12:39:52,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:39:52,077 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-11-02 12:39:52,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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 12:39:52,077 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-11-02 12:39:52,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-02 12:39:52,079 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:52,080 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:39:52,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 12:39:52,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-02 12:39:52,284 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:52,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:52,285 INFO L85 PathProgramCache]: Analyzing trace with hash 281721796, now seen corresponding path program 3 times [2024-11-02 12:39:52,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:52,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452056121] [2024-11-02 12:39:52,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:52,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2024-11-02 12:39:52,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:52,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452056121] [2024-11-02 12:39:52,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452056121] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:39:52,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509131046] [2024-11-02 12:39:52,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:39:52,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:52,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:52,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:39:52,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:39:53,003 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:39:53,003 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:39:53,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-02 12:39:53,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:39:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2024-11-02 12:39:53,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:39:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2024-11-02 12:39:53,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509131046] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:39:53,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1437341475] [2024-11-02 12:39:53,352 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-02 12:39:53,352 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:39:53,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:39:53,353 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:39:53,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:39:53,605 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:39:54,220 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '956#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) 0)) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-02 12:39:54,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:39:54,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:39:54,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-02 12:39:54,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692483454] [2024-11-02 12:39:54,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:39:54,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-02 12:39:54,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:54,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-02 12:39:54,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=502, Unknown=0, NotChecked=0, Total=812 [2024-11-02 12:39:54,224 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 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 12:39:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:39:54,666 INFO L93 Difference]: Finished difference Result 136 states and 191 transitions. [2024-11-02 12:39:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-02 12:39:54,666 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 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 48 [2024-11-02 12:39:54,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:39:54,668 INFO L225 Difference]: With dead ends: 136 [2024-11-02 12:39:54,670 INFO L226 Difference]: Without dead ends: 98 [2024-11-02 12:39:54,671 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 105 SyntacticMatches, 22 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=310, Invalid=502, Unknown=0, NotChecked=0, Total=812 [2024-11-02 12:39:54,673 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:39:54,676 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:39:54,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-02 12:39:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2024-11-02 12:39:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 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 12:39:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2024-11-02 12:39:54,705 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 48 [2024-11-02 12:39:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:39:54,706 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2024-11-02 12:39:54,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 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 12:39:54,709 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2024-11-02 12:39:54,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-02 12:39:54,711 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:54,713 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:39:54,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:39:54,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-02 12:39:54,914 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:54,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:54,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1170070020, now seen corresponding path program 4 times [2024-11-02 12:39:54,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:54,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910502564] [2024-11-02 12:39:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:54,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2024-11-02 12:39:56,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:56,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910502564] [2024-11-02 12:39:56,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910502564] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:39:56,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666820394] [2024-11-02 12:39:56,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 12:39:56,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:56,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:56,347 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:39:56,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:39:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:56,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-02 12:39:56,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:39:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2024-11-02 12:39:56,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:39:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2024-11-02 12:39:57,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666820394] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:39:57,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1870986555] [2024-11-02 12:39:57,667 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-02 12:39:57,668 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:39:57,668 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:39:57,668 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:39:57,668 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:39:57,899 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:39:59,343 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2033#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) 0)) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-02 12:39:59,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:39:59,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:39:59,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-11-02 12:39:59,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579425431] [2024-11-02 12:39:59,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:39:59,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-02 12:39:59,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:59,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-02 12:39:59,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1186, Invalid=1570, Unknown=0, NotChecked=0, Total=2756 [2024-11-02 12:39:59,348 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 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 12:40:00,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:00,330 INFO L93 Difference]: Finished difference Result 268 states and 371 transitions. [2024-11-02 12:40:00,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-02 12:40:00,331 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 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 96 [2024-11-02 12:40:00,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:00,333 INFO L225 Difference]: With dead ends: 268 [2024-11-02 12:40:00,333 INFO L226 Difference]: Without dead ends: 194 [2024-11-02 12:40:00,335 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 213 SyntacticMatches, 46 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3539 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1186, Invalid=1570, Unknown=0, NotChecked=0, Total=2756 [2024-11-02 12:40:00,336 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:00,337 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-02 12:40:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-11-02 12:40:00,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2024-11-02 12:40:00,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 193 states have internal predecessors, (198), 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 12:40:00,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2024-11-02 12:40:00,357 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 96 [2024-11-02 12:40:00,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:00,358 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2024-11-02 12:40:00,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 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 12:40:00,358 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2024-11-02 12:40:00,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-11-02 12:40:00,363 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:00,364 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:00,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-02 12:40:00,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:00,569 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:40:00,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:00,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1620527484, now seen corresponding path program 5 times [2024-11-02 12:40:00,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:00,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282149790] [2024-11-02 12:40:00,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:00,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2024-11-02 12:40:05,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:05,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282149790] [2024-11-02 12:40:05,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282149790] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:40:05,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658661673] [2024-11-02 12:40:05,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:40:05,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:05,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:05,216 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:40:05,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3306431-823e-47bf-a3ba-bfe6f8e7722c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process