./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E --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 d2b9c65bc0d5e6814219e058019ca5895f861b5993bd9ff39cc6b3d5fb3e6a41 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:45:58,442 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:45:58,501 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:45:58,506 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:45:58,507 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:45:58,528 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:45:58,529 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:45:58,529 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:45:58,530 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:45:58,530 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:45:58,530 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:45:58,530 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:45:58,530 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:45:58,531 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:45:58,531 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:45:58,531 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:45:58,531 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:45:58,531 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:45:58,531 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:45:58,531 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:45:58,532 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:45:58,532 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:45:58,532 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:45:58,532 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:45:58,532 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:45:58,533 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:45:58,533 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:45:58,533 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:45:58,533 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:45:58,533 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:45:58,533 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:45:58,534 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:45:58,534 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:45:58,534 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:45:58,534 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:45:58,534 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:45:58,534 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:45:58,534 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:45:58,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:45:58,535 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:45:58,535 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:45:58,535 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:45:58,535 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:45:58,535 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:45:58,535 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:45:58,535 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:45:58,535 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:45:58,535 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E 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 -> d2b9c65bc0d5e6814219e058019ca5895f861b5993bd9ff39cc6b3d5fb3e6a41 [2024-11-14 04:45:58,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:45:58,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:45:58,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:45:58,895 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:45:58,896 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:45:58,897 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c Unable to find full path for "g++" [2024-11-14 04:46:00,750 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:46:01,047 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:46:01,047 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2024-11-14 04:46:01,055 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/data/33bb82b54/7c8b4c37c4cb4902a49b0167bb564288/FLAG451a0334d [2024-11-14 04:46:01,075 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/data/33bb82b54/7c8b4c37c4cb4902a49b0167bb564288 [2024-11-14 04:46:01,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:46:01,080 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:46:01,082 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:46:01,083 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:46:01,088 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:46:01,088 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,089 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e90a039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01, skipping insertion in model container [2024-11-14 04:46:01,089 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,108 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:46:01,291 WARN L250 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_9238968d-877b-4f92-83ac-40ce4cc5f1ad/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c[860,873] [2024-11-14 04:46:01,297 WARN L250 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_9238968d-877b-4f92-83ac-40ce4cc5f1ad/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c[916,929] [2024-11-14 04:46:01,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:46:01,308 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:46:01,324 WARN L250 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_9238968d-877b-4f92-83ac-40ce4cc5f1ad/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c[860,873] [2024-11-14 04:46:01,326 WARN L250 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_9238968d-877b-4f92-83ac-40ce4cc5f1ad/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c[916,929] [2024-11-14 04:46:01,327 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:46:01,341 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:46:01,341 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01 WrapperNode [2024-11-14 04:46:01,342 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:46:01,344 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:46:01,344 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:46:01,344 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:46:01,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,357 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,372 INFO L138 Inliner]: procedures = 11, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2024-11-14 04:46:01,373 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:46:01,373 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:46:01,374 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:46:01,375 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:46:01,380 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,382 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,382 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,385 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,389 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,390 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,395 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,396 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:46:01,397 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:46:01,397 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:46:01,397 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:46:01,398 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:46:01,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:46:01,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:46:01,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:46:01,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:46:01,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:46:01,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:46:01,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:46:01,539 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:46:01,541 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:46:01,691 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-14 04:46:01,691 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:46:01,728 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:46:01,728 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 04:46:01,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:46:01 BoogieIcfgContainer [2024-11-14 04:46:01,729 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:46:01,732 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:46:01,732 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:46:01,738 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:46:01,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:46:01" (1/3) ... [2024-11-14 04:46:01,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b3369d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:46:01, skipping insertion in model container [2024-11-14 04:46:01,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (2/3) ... [2024-11-14 04:46:01,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b3369d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:46:01, skipping insertion in model container [2024-11-14 04:46:01,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:46:01" (3/3) ... [2024-11-14 04:46:01,742 INFO L112 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.c [2024-11-14 04:46:01,760 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:46:01,762 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG linear-inequality-inv-a.c that has 1 procedures, 11 locations, 1 initial locations, 1 loop locations, and 2 error locations. [2024-11-14 04:46:01,828 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:46:01,844 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;@4c84abfc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:46:01,845 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 04:46:01,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 8 states have (on average 1.75) internal successors, (14), 10 states have internal predecessors, (14), 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) [2024-11-14 04:46:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 04:46:01,857 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:46:01,858 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 04:46:01,858 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:46:01,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:46:01,863 INFO L85 PathProgramCache]: Analyzing trace with hash 62121635, now seen corresponding path program 1 times [2024-11-14 04:46:01,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:46:01,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848816128] [2024-11-14 04:46:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:01,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:46:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:02,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:46:02,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848816128] [2024-11-14 04:46:02,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848816128] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:46:02,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:46:02,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:46:02,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833137577] [2024-11-14 04:46:02,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:46:02,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:46:02,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:46:02,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:46:02,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:46:02,230 INFO L87 Difference]: Start difference. First operand has 11 states, 8 states have (on average 1.75) internal successors, (14), 10 states have internal predecessors, (14), 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 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-11-14 04:46:02,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:46:02,263 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2024-11-14 04:46:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:46:02,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2024-11-14 04:46:02,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:46:02,275 INFO L225 Difference]: With dead ends: 20 [2024-11-14 04:46:02,275 INFO L226 Difference]: Without dead ends: 10 [2024-11-14 04:46:02,278 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:46:02,281 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:46:02,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:46:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-14 04:46:02,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-11-14 04:46:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 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) [2024-11-14 04:46:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2024-11-14 04:46:02,322 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2024-11-14 04:46:02,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:46:02,322 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2024-11-14 04:46:02,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-11-14 04:46:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2024-11-14 04:46:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 04:46:02,323 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:46:02,323 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 04:46:02,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:46:02,323 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:46:02,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:46:02,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1925101820, now seen corresponding path program 1 times [2024-11-14 04:46:02,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:46:02,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539136062] [2024-11-14 04:46:02,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:02,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:46:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:02,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:46:02,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539136062] [2024-11-14 04:46:02,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539136062] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:46:02,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484105068] [2024-11-14 04:46:02,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:02,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:02,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:46:02,586 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:46:02,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:46:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:02,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:46:02,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:46:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:02,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:46:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:02,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484105068] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:46:02,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [652709238] [2024-11-14 04:46:02,949 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:46:02,950 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:46:02,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:46:02,957 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:46:02,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:46:03,222 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:46:09,735 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '90#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~0#1_16| Int) (|v_ULTIMATE.start_main_~n~0#1_12| Int)) (and (<= 0 |v_ULTIMATE.start_main_~i~0#1_16|) (<= (mod |v_ULTIMATE.start_main_~n~0#1_12| 256) (mod |v_ULTIMATE.start_main_~i~0#1_16| 4294967296)))) (exists ((|v_ULTIMATE.start_main_~v~0#1_16| Int) (|v_ULTIMATE.start_main_~s~0#1_21| Int)) (<= (+ (mod |v_ULTIMATE.start_main_~s~0#1_21| 4294967296) 1) (mod |v_ULTIMATE.start_main_~v~0#1_16| 256))))' at error location [2024-11-14 04:46:09,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:46:09,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:46:09,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-14 04:46:09,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635260745] [2024-11-14 04:46:09,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:46:09,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:46:09,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:46:09,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:46:09,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=80, Unknown=3, NotChecked=0, Total=110 [2024-11-14 04:46:09,738 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2024-11-14 04:46:09,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:46:09,848 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2024-11-14 04:46:09,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:46:09,849 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 [2024-11-14 04:46:09,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:46:09,850 INFO L225 Difference]: With dead ends: 19 [2024-11-14 04:46:09,851 INFO L226 Difference]: Without dead ends: 17 [2024-11-14 04:46:09,851 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=41, Invalid=112, Unknown=3, NotChecked=0, Total=156 [2024-11-14 04:46:09,853 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:46:09,854 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 8 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:46:09,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-14 04:46:09,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2024-11-14 04:46:09,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 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) [2024-11-14 04:46:09,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2024-11-14 04:46:09,861 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 6 [2024-11-14 04:46:09,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:46:09,861 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2024-11-14 04:46:09,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2024-11-14 04:46:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2024-11-14 04:46:09,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 04:46:09,862 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:46:09,862 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:46:09,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:46:10,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-14 04:46:10,064 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:46:10,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:46:10,065 INFO L85 PathProgramCache]: Analyzing trace with hash -451381665, now seen corresponding path program 1 times [2024-11-14 04:46:10,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:46:10,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997448910] [2024-11-14 04:46:10,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:10,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:46:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:10,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:10,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:46:10,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997448910] [2024-11-14 04:46:10,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997448910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:46:10,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079635472] [2024-11-14 04:46:10,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:10,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:10,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:46:10,185 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:46:10,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:46:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:10,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:46:10,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:46:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:10,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:46:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:10,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079635472] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:46:10,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2121613722] [2024-11-14 04:46:10,318 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:46:10,319 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:46:10,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:46:10,319 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:46:10,319 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:46:10,445 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:46:10,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '183#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~s~0#1_29| Int)) (<= 65026 (mod |v_ULTIMATE.start_main_~s~0#1_29| 4294967296))) (exists ((|v_ULTIMATE.start_main_~i~0#1_22| Int) (|v_ULTIMATE.start_main_~n~0#1_13| Int)) (and (<= (mod |v_ULTIMATE.start_main_~n~0#1_13| 256) (mod |v_ULTIMATE.start_main_~i~0#1_22| 4294967296)) (<= 0 |v_ULTIMATE.start_main_~i~0#1_22|))))' at error location [2024-11-14 04:46:10,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:46:10,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:46:10,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-14 04:46:10,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882519394] [2024-11-14 04:46:10,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:46:10,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:46:10,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:46:10,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:46:10,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:46:10,569 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2024-11-14 04:46:10,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:46:10,618 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2024-11-14 04:46:10,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:46:10,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 [2024-11-14 04:46:10,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:46:10,619 INFO L225 Difference]: With dead ends: 21 [2024-11-14 04:46:10,619 INFO L226 Difference]: Without dead ends: 13 [2024-11-14 04:46:10,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:46:10,620 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:46:10,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:46:10,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-14 04:46:10,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-14 04:46:10,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 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) [2024-11-14 04:46:10,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2024-11-14 04:46:10,624 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2024-11-14 04:46:10,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:46:10,625 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2024-11-14 04:46:10,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2024-11-14 04:46:10,625 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2024-11-14 04:46:10,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 04:46:10,626 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:46:10,626 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2024-11-14 04:46:10,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:46:10,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:10,826 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:46:10,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:46:10,827 INFO L85 PathProgramCache]: Analyzing trace with hash -654166813, now seen corresponding path program 2 times [2024-11-14 04:46:10,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:46:10,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485921313] [2024-11-14 04:46:10,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:10,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:46:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:11,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:46:11,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485921313] [2024-11-14 04:46:11,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485921313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:46:11,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610419721] [2024-11-14 04:46:11,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:46:11,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:11,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:46:11,070 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:46:11,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:46:11,132 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:46:11,133 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:46:11,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 04:46:11,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:46:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:11,230 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:46:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:11,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610419721] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:46:11,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1956848085] [2024-11-14 04:46:11,540 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:46:11,541 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:46:11,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:46:11,541 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:46:11,543 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:46:11,661 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:46:18,221 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '291#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~v~0#1_30| Int) (|v_ULTIMATE.start_main_~s~0#1_43| Int)) (<= (+ (mod |v_ULTIMATE.start_main_~s~0#1_43| 4294967296) 1) (mod |v_ULTIMATE.start_main_~v~0#1_30| 256))) (exists ((|v_ULTIMATE.start_main_~i~0#1_31| Int) (|v_ULTIMATE.start_main_~n~0#1_14| Int)) (and (<= 0 |v_ULTIMATE.start_main_~i~0#1_31|) (<= (mod |v_ULTIMATE.start_main_~n~0#1_14| 256) (mod |v_ULTIMATE.start_main_~i~0#1_31| 4294967296)))))' at error location [2024-11-14 04:46:18,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:46:18,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:46:18,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-14 04:46:18,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519143995] [2024-11-14 04:46:18,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:46:18,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 04:46:18,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:46:18,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 04:46:18,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=200, Unknown=3, NotChecked=0, Total=272 [2024-11-14 04:46:18,223 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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) [2024-11-14 04:46:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:46:18,591 INFO L93 Difference]: Finished difference Result 31 states and 42 transitions. [2024-11-14 04:46:18,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 04:46:18,593 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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 9 [2024-11-14 04:46:18,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:46:18,594 INFO L225 Difference]: With dead ends: 31 [2024-11-14 04:46:18,595 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 04:46:18,595 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=173, Invalid=424, Unknown=3, NotChecked=0, Total=600 [2024-11-14 04:46:18,598 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:46:18,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 12 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:46:18,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 04:46:18,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2024-11-14 04:46:18,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 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) [2024-11-14 04:46:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2024-11-14 04:46:18,607 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 9 [2024-11-14 04:46:18,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:46:18,607 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-11-14 04:46:18,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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) [2024-11-14 04:46:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2024-11-14 04:46:18,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 04:46:18,609 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:46:18,609 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2024-11-14 04:46:18,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:46:18,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:18,813 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:46:18,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:46:18,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1195669336, now seen corresponding path program 2 times [2024-11-14 04:46:18,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:46:18,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325461041] [2024-11-14 04:46:18,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:18,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:46:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:19,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:46:19,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325461041] [2024-11-14 04:46:19,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325461041] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:46:19,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697604999] [2024-11-14 04:46:19,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:46:19,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:19,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:46:19,138 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:46:19,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:46:19,194 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:46:19,194 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:46:19,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 04:46:19,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:46:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:19,263 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:46:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:19,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697604999] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:46:19,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1918457381] [2024-11-14 04:46:19,495 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:46:19,495 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:46:19,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:46:19,496 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:46:19,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:46:19,588 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:46:19,746 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '450#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~0#1_40| Int) (|v_ULTIMATE.start_main_~n~0#1_15| Int)) (and (<= 0 |v_ULTIMATE.start_main_~i~0#1_40|) (<= (mod |v_ULTIMATE.start_main_~n~0#1_15| 256) (mod |v_ULTIMATE.start_main_~i~0#1_40| 4294967296)))) (exists ((|v_ULTIMATE.start_main_~s~0#1_57| Int)) (<= 65026 (mod |v_ULTIMATE.start_main_~s~0#1_57| 4294967296))))' at error location [2024-11-14 04:46:19,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:46:19,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:46:19,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-14 04:46:19,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001189717] [2024-11-14 04:46:19,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:46:19,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 04:46:19,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:46:19,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 04:46:19,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2024-11-14 04:46:19,747 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2024-11-14 04:46:19,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:46:19,834 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2024-11-14 04:46:19,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 04:46:19,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) Word has length 10 [2024-11-14 04:46:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:46:19,835 INFO L225 Difference]: With dead ends: 33 [2024-11-14 04:46:19,836 INFO L226 Difference]: Without dead ends: 19 [2024-11-14 04:46:19,836 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2024-11-14 04:46:19,837 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:46:19,837 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 9 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:46:19,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-14 04:46:19,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-14 04:46:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 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) [2024-11-14 04:46:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2024-11-14 04:46:19,842 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2024-11-14 04:46:19,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:46:19,842 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2024-11-14 04:46:19,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2024-11-14 04:46:19,842 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2024-11-14 04:46:19,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 04:46:19,843 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:46:19,843 INFO L215 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2024-11-14 04:46:19,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:46:20,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:20,048 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:46:20,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:46:20,053 INFO L85 PathProgramCache]: Analyzing trace with hash 577539651, now seen corresponding path program 3 times [2024-11-14 04:46:20,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:46:20,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709016286] [2024-11-14 04:46:20,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:20,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:46:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:20,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:46:20,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709016286] [2024-11-14 04:46:20,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709016286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:46:20,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747381877] [2024-11-14 04:46:20,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:46:20,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:20,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:46:20,649 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:46:20,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:46:20,711 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:46:20,711 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:46:20,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 04:46:20,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:46:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:20,860 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:46:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:21,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747381877] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:46:21,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1401803646] [2024-11-14 04:46:21,582 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:46:21,582 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:46:21,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:46:21,583 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:46:21,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:46:21,647 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:46:28,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '636#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_55| Int) (|v_ULTIMATE.start_main_~n~0#1_16| Int)) (and (<= (mod |v_ULTIMATE.start_main_~n~0#1_16| 256) (mod |v_ULTIMATE.start_main_~i~0#1_55| 4294967296)) (<= 0 |v_ULTIMATE.start_main_~i~0#1_55|))) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~v~0#1_53| Int) (|v_ULTIMATE.start_main_~s~0#1_83| Int)) (<= (+ (mod |v_ULTIMATE.start_main_~s~0#1_83| 4294967296) 1) (mod |v_ULTIMATE.start_main_~v~0#1_53| 256))))' at error location [2024-11-14 04:46:28,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:46:28,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:46:28,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-14 04:46:28,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586062224] [2024-11-14 04:46:28,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:46:28,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 04:46:28,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:46:28,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 04:46:28,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=548, Unknown=3, NotChecked=0, Total=812 [2024-11-14 04:46:28,290 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2024-11-14 04:46:29,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:46:29,094 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2024-11-14 04:46:29,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-14 04:46:29,094 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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 15 [2024-11-14 04:46:29,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:46:29,095 INFO L225 Difference]: With dead ends: 55 [2024-11-14 04:46:29,095 INFO L226 Difference]: Without dead ends: 53 [2024-11-14 04:46:29,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=761, Invalid=1588, Unknown=3, NotChecked=0, Total=2352 [2024-11-14 04:46:29,097 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:46:29,097 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 16 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:46:29,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-14 04:46:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2024-11-14 04:46:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 31 states have internal predecessors, (44), 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) [2024-11-14 04:46:29,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2024-11-14 04:46:29,104 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 15 [2024-11-14 04:46:29,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:46:29,104 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2024-11-14 04:46:29,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2024-11-14 04:46:29,104 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2024-11-14 04:46:29,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 04:46:29,105 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:46:29,105 INFO L215 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2024-11-14 04:46:29,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 04:46:29,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 04:46:29,305 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:46:29,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:46:29,306 INFO L85 PathProgramCache]: Analyzing trace with hash 723864056, now seen corresponding path program 3 times [2024-11-14 04:46:29,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:46:29,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702535550] [2024-11-14 04:46:29,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:29,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:46:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:29,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:46:29,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702535550] [2024-11-14 04:46:29,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702535550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:46:29,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936383675] [2024-11-14 04:46:29,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:46:29,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:29,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:46:29,854 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:46:29,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:46:29,921 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:46:29,922 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:46:29,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 04:46:29,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:46:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:30,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:46:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:30,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936383675] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:46:30,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [51356612] [2024-11-14 04:46:30,612 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:46:30,612 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:46:30,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:46:30,613 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:46:30,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:46:30,679 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:46:30,856 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '927#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~n~0#1_17| Int) (|v_ULTIMATE.start_main_~i~0#1_70| Int)) (and (<= 0 |v_ULTIMATE.start_main_~i~0#1_70|) (<= (mod |v_ULTIMATE.start_main_~n~0#1_17| 256) (mod |v_ULTIMATE.start_main_~i~0#1_70| 4294967296)))) (exists ((|v_ULTIMATE.start_main_~s~0#1_109| Int)) (<= 65026 (mod |v_ULTIMATE.start_main_~s~0#1_109| 4294967296))))' at error location [2024-11-14 04:46:30,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:46:30,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:46:30,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-11-14 04:46:30,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028375962] [2024-11-14 04:46:30,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:46:30,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 04:46:30,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:46:30,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 04:46:30,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2024-11-14 04:46:30,858 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 24 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) [2024-11-14 04:46:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:46:30,978 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2024-11-14 04:46:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 04:46:30,978 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 24 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) Word has length 16 [2024-11-14 04:46:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:46:30,979 INFO L225 Difference]: With dead ends: 57 [2024-11-14 04:46:30,979 INFO L226 Difference]: Without dead ends: 31 [2024-11-14 04:46:30,980 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2024-11-14 04:46:30,980 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:46:30,980 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 9 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:46:30,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-14 04:46:30,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-14 04:46:30,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 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) [2024-11-14 04:46:30,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2024-11-14 04:46:30,987 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 16 [2024-11-14 04:46:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:46:30,987 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2024-11-14 04:46:30,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 24 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) [2024-11-14 04:46:30,987 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2024-11-14 04:46:30,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 04:46:30,987 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:46:30,988 INFO L215 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2024-11-14 04:46:31,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:46:31,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:31,188 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:46:31,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:46:31,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1911183101, now seen corresponding path program 4 times [2024-11-14 04:46:31,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:46:31,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050721903] [2024-11-14 04:46:31,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:31,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:46:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:32,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:46:32,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050721903] [2024-11-14 04:46:32,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050721903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:46:32,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813198732] [2024-11-14 04:46:32,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:46:32,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:32,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:46:32,569 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:46:32,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:46:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:32,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-14 04:46:32,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:46:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:32,833 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:46:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:35,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813198732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:46:35,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [784305927] [2024-11-14 04:46:35,328 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:46:35,328 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:46:35,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:46:35,328 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:46:35,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:46:35,379 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:46:41,927 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1269#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~s~0#1_159| Int) (|v_ULTIMATE.start_main_~v~0#1_94| Int)) (<= (+ (mod |v_ULTIMATE.start_main_~s~0#1_159| 4294967296) 1) (mod |v_ULTIMATE.start_main_~v~0#1_94| 256))) (exists ((|v_ULTIMATE.start_main_~n~0#1_18| Int) (|v_ULTIMATE.start_main_~i~0#1_97| Int)) (and (<= 0 |v_ULTIMATE.start_main_~i~0#1_97|) (<= (mod |v_ULTIMATE.start_main_~n~0#1_18| 256) (mod |v_ULTIMATE.start_main_~i~0#1_97| 4294967296)))))' at error location [2024-11-14 04:46:41,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:46:41,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:46:41,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-11-14 04:46:41,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149489015] [2024-11-14 04:46:41,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:46:41,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 04:46:41,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:46:41,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 04:46:41,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1077, Invalid=1676, Unknown=3, NotChecked=0, Total=2756 [2024-11-14 04:46:41,931 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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) [2024-11-14 04:46:44,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:46:44,523 INFO L93 Difference]: Finished difference Result 103 states and 150 transitions. [2024-11-14 04:46:44,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-14 04:46:44,524 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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 27 [2024-11-14 04:46:44,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:46:44,525 INFO L225 Difference]: With dead ends: 103 [2024-11-14 04:46:44,525 INFO L226 Difference]: Without dead ends: 101 [2024-11-14 04:46:44,531 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=3233, Invalid=6076, Unknown=3, NotChecked=0, Total=9312 [2024-11-14 04:46:44,532 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 151 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:46:44,532 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 12 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:46:44,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-14 04:46:44,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 56. [2024-11-14 04:46:44,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 55 states have internal predecessors, (80), 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) [2024-11-14 04:46:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 80 transitions. [2024-11-14 04:46:44,551 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 80 transitions. Word has length 27 [2024-11-14 04:46:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:46:44,551 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 80 transitions. [2024-11-14 04:46:44,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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) [2024-11-14 04:46:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 80 transitions. [2024-11-14 04:46:44,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 04:46:44,553 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:46:44,554 INFO L215 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2024-11-14 04:46:44,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:46:44,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:44,754 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:46:44,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:46:44,755 INFO L85 PathProgramCache]: Analyzing trace with hash 882870072, now seen corresponding path program 4 times [2024-11-14 04:46:44,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:46:44,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834323389] [2024-11-14 04:46:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:44,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:46:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:46,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:46:46,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834323389] [2024-11-14 04:46:46,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834323389] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:46:46,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069157094] [2024-11-14 04:46:46,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:46:46,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:46,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:46:46,014 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:46:46,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:46:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:46,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-14 04:46:46,481 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:46:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:46,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:46:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:48,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069157094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:46:48,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1654068240] [2024-11-14 04:46:48,090 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:46:48,090 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:46:48,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:46:48,091 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:46:48,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:46:48,153 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:46:48,327 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1824#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~s~0#1_209| Int)) (<= 65026 (mod |v_ULTIMATE.start_main_~s~0#1_209| 4294967296))) (exists ((|v_ULTIMATE.start_main_~i~0#1_124| Int) (|v_ULTIMATE.start_main_~n~0#1_19| Int)) (and (<= (mod |v_ULTIMATE.start_main_~n~0#1_19| 256) (mod |v_ULTIMATE.start_main_~i~0#1_124| 4294967296)) (<= 0 |v_ULTIMATE.start_main_~i~0#1_124|))))' at error location [2024-11-14 04:46:48,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:46:48,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:46:48,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2024-11-14 04:46:48,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962512478] [2024-11-14 04:46:48,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:46:48,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-14 04:46:48,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:46:48,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-14 04:46:48,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 04:46:48,330 INFO L87 Difference]: Start difference. First operand 56 states and 80 transitions. Second operand has 48 states, 48 states have (on average 1.125) internal successors, (54), 48 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) [2024-11-14 04:46:48,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:46:48,538 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2024-11-14 04:46:48,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 04:46:48,538 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.125) internal successors, (54), 48 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) Word has length 28 [2024-11-14 04:46:48,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:46:48,539 INFO L225 Difference]: With dead ends: 105 [2024-11-14 04:46:48,539 INFO L226 Difference]: Without dead ends: 55 [2024-11-14 04:46:48,540 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 04:46:48,540 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 130 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:46:48,540 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 15 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:46:48,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-14 04:46:48,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-14 04:46:48,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 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) [2024-11-14 04:46:48,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2024-11-14 04:46:48,549 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 28 [2024-11-14 04:46:48,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:46:48,550 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2024-11-14 04:46:48,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.125) internal successors, (54), 48 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) [2024-11-14 04:46:48,550 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2024-11-14 04:46:48,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-14 04:46:48,551 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:46:48,551 INFO L215 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2024-11-14 04:46:48,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 04:46:48,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:48,754 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:46:48,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:46:48,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1105297027, now seen corresponding path program 5 times [2024-11-14 04:46:48,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:46:48,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105913315] [2024-11-14 04:46:48,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:48,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:46:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:52,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:46:52,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105913315] [2024-11-14 04:46:52,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105913315] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:46:52,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130792560] [2024-11-14 04:46:52,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:46:52,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:52,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:46:52,580 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:46:52,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:46:52,836 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-11-14 04:46:52,836 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:46:52,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-14 04:46:52,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:46:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:53,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:46:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:46:58,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130792560] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:46:58,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2086638470] [2024-11-14 04:46:58,357 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:46:58,357 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:46:58,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:46:58,357 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:46:58,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:46:58,401 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:47:05,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2478#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~0#1_175| Int) (|v_ULTIMATE.start_main_~n~0#1_20| Int)) (and (<= (mod |v_ULTIMATE.start_main_~n~0#1_20| 256) (mod |v_ULTIMATE.start_main_~i~0#1_175| 4294967296)) (<= 0 |v_ULTIMATE.start_main_~i~0#1_175|))) (exists ((|v_ULTIMATE.start_main_~v~0#1_171| Int) (|v_ULTIMATE.start_main_~s~0#1_307| Int)) (<= (+ (mod |v_ULTIMATE.start_main_~s~0#1_307| 4294967296) 1) (mod |v_ULTIMATE.start_main_~v~0#1_171| 256))))' at error location [2024-11-14 04:47:05,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:47:05,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:47:05,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-11-14 04:47:05,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404420899] [2024-11-14 04:47:05,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:47:05,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-14 04:47:05,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:47:05,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-14 04:47:05,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4437, Invalid=5660, Unknown=3, NotChecked=0, Total=10100 [2024-11-14 04:47:05,033 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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) [2024-11-14 04:47:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:47:11,393 INFO L93 Difference]: Finished difference Result 199 states and 294 transitions. [2024-11-14 04:47:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2024-11-14 04:47:11,393 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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 51 [2024-11-14 04:47:11,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:47:11,395 INFO L225 Difference]: With dead ends: 199 [2024-11-14 04:47:11,395 INFO L226 Difference]: Without dead ends: 197 [2024-11-14 04:47:11,402 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8073 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=13361, Invalid=23692, Unknown=3, NotChecked=0, Total=37056 [2024-11-14 04:47:11,402 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 412 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:47:11,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 12 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:47:11,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-14 04:47:11,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 104. [2024-11-14 04:47:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 102 states have (on average 1.4901960784313726) internal successors, (152), 103 states have internal predecessors, (152), 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) [2024-11-14 04:47:11,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 152 transitions. [2024-11-14 04:47:11,424 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 152 transitions. Word has length 51 [2024-11-14 04:47:11,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:47:11,424 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 152 transitions. [2024-11-14 04:47:11,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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) [2024-11-14 04:47:11,425 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 152 transitions. [2024-11-14 04:47:11,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-14 04:47:11,425 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:47:11,425 INFO L215 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2024-11-14 04:47:11,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 04:47:11,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 04:47:11,626 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:47:11,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:47:11,626 INFO L85 PathProgramCache]: Analyzing trace with hash -95526472, now seen corresponding path program 5 times [2024-11-14 04:47:11,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:47:11,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62068242] [2024-11-14 04:47:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:47:11,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:47:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:47:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:47:15,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:47:15,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62068242] [2024-11-14 04:47:15,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62068242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:47:15,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825266908] [2024-11-14 04:47:15,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:47:15,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:47:15,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:47:15,641 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:47:15,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:47:15,871 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-11-14 04:47:15,871 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:47:15,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-14 04:47:15,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:47:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:47:16,230 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:47:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:47:21,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825266908] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:47:21,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809157223] [2024-11-14 04:47:21,496 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:47:21,496 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:47:21,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:47:21,496 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:47:21,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:47:21,540 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:47:21,867 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3561#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~s~0#1_405| Int)) (<= 65026 (mod |v_ULTIMATE.start_main_~s~0#1_405| 4294967296))) (exists ((|v_ULTIMATE.start_main_~i~0#1_226| Int) (|v_ULTIMATE.start_main_~n~0#1_21| Int)) (and (<= (mod |v_ULTIMATE.start_main_~n~0#1_21| 256) (mod |v_ULTIMATE.start_main_~i~0#1_226| 4294967296)) (<= 0 |v_ULTIMATE.start_main_~i~0#1_226|))))' at error location [2024-11-14 04:47:21,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:47:21,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:47:21,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 96 [2024-11-14 04:47:21,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186268700] [2024-11-14 04:47:21,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:47:21,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-14 04:47:21,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:47:21,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-14 04:47:21,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4568, Invalid=5134, Unknown=0, NotChecked=0, Total=9702 [2024-11-14 04:47:21,871 INFO L87 Difference]: Start difference. First operand 104 states and 152 transitions. Second operand has 96 states, 96 states have (on average 1.0625) internal successors, (102), 96 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) [2024-11-14 04:47:22,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:47:22,388 INFO L93 Difference]: Finished difference Result 201 states and 248 transitions. [2024-11-14 04:47:22,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-14 04:47:22,389 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0625) internal successors, (102), 96 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) Word has length 52 [2024-11-14 04:47:22,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:47:22,390 INFO L225 Difference]: With dead ends: 201 [2024-11-14 04:47:22,390 INFO L226 Difference]: Without dead ends: 103 [2024-11-14 04:47:22,391 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4568, Invalid=5134, Unknown=0, NotChecked=0, Total=9702 [2024-11-14 04:47:22,392 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 332 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:47:22,392 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 13 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:47:22,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-14 04:47:22,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2024-11-14 04:47:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 102 states have internal predecessors, (103), 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) [2024-11-14 04:47:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2024-11-14 04:47:22,415 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 52 [2024-11-14 04:47:22,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:47:22,415 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2024-11-14 04:47:22,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0625) internal successors, (102), 96 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) [2024-11-14 04:47:22,416 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2024-11-14 04:47:22,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-14 04:47:22,417 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:47:22,417 INFO L215 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2024-11-14 04:47:22,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 04:47:22,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:47:22,618 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:47:22,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:47:22,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1621076355, now seen corresponding path program 6 times [2024-11-14 04:47:22,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:47:22,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125917624] [2024-11-14 04:47:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:47:22,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:47:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:47:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:47:34,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:47:34,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125917624] [2024-11-14 04:47:34,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125917624] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:47:34,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85563099] [2024-11-14 04:47:34,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:47:34,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:47:34,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:47:34,361 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:47:34,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:47:34,596 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:47:34,596 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:47:34,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-11-14 04:47:34,607 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:47:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:47:35,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:47:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:47:55,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85563099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:47:55,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [423253802] [2024-11-14 04:47:55,820 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:47:55,820 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:47:55,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:47:55,820 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:47:55,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:47:55,874 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:48:02,710 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4839#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~0#1_325| Int) (|v_ULTIMATE.start_main_~n~0#1_22| Int)) (and (<= (mod |v_ULTIMATE.start_main_~n~0#1_22| 256) (mod |v_ULTIMATE.start_main_~i~0#1_325| 4294967296)) (<= 0 |v_ULTIMATE.start_main_~i~0#1_325|))) (exists ((|v_ULTIMATE.start_main_~v~0#1_320| Int) (|v_ULTIMATE.start_main_~s~0#1_599| Int)) (<= (+ (mod |v_ULTIMATE.start_main_~s~0#1_599| 4294967296) 1) (mod |v_ULTIMATE.start_main_~v~0#1_320| 256))))' at error location [2024-11-14 04:48:02,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:48:02,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:48:02,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2024-11-14 04:48:02,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493389189] [2024-11-14 04:48:02,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:48:02,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-11-14 04:48:02,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:48:02,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-11-14 04:48:02,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18069, Invalid=20540, Unknown=3, NotChecked=0, Total=38612 [2024-11-14 04:48:02,721 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 193 states have internal predecessors, (199), 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) [2024-11-14 04:48:26,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:48:26,520 INFO L93 Difference]: Finished difference Result 391 states and 582 transitions. [2024-11-14 04:48:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2024-11-14 04:48:26,521 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 193 states have internal predecessors, (199), 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 99 [2024-11-14 04:48:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:48:26,523 INFO L225 Difference]: With dead ends: 391 [2024-11-14 04:48:26,524 INFO L226 Difference]: Without dead ends: 389 [2024-11-14 04:48:26,531 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32289 ImplicationChecksByTransitivity, 53.4s TimeCoverageRelationStatistics Valid=54353, Invalid=93484, Unknown=3, NotChecked=0, Total=147840 [2024-11-14 04:48:26,534 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 769 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:48:26,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [769 Valid, 22 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 04:48:26,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2024-11-14 04:48:26,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 200. [2024-11-14 04:48:26,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 198 states have (on average 1.494949494949495) internal successors, (296), 199 states have internal predecessors, (296), 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) [2024-11-14 04:48:26,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 296 transitions. [2024-11-14 04:48:26,571 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 296 transitions. Word has length 99 [2024-11-14 04:48:26,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:48:26,572 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 296 transitions. [2024-11-14 04:48:26,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 193 states have internal predecessors, (199), 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) [2024-11-14 04:48:26,574 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 296 transitions. [2024-11-14 04:48:26,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-14 04:48:26,575 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:48:26,575 INFO L215 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1] [2024-11-14 04:48:26,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:48:26,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:48:26,776 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:48:26,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:48:26,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1286236488, now seen corresponding path program 6 times [2024-11-14 04:48:26,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:48:26,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154492830] [2024-11-14 04:48:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:48:26,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:48:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:48:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:48:38,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:48:38,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154492830] [2024-11-14 04:48:38,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154492830] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:48:38,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811030882] [2024-11-14 04:48:38,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:48:38,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:48:38,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:48:38,674 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:48:38,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:48:39,001 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:48:39,001 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:48:39,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-11-14 04:48:39,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:48:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:48:39,577 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:49:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:49:00,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811030882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:49:00,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1106465268] [2024-11-14 04:49:00,325 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:49:00,325 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:49:00,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:49:00,326 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:49:00,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:49:00,367 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:49:00,884 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6978#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~0#1_424| Int) (|v_ULTIMATE.start_main_~n~0#1_23| Int)) (and (<= 0 |v_ULTIMATE.start_main_~i~0#1_424|) (<= (mod |v_ULTIMATE.start_main_~n~0#1_23| 256) (mod |v_ULTIMATE.start_main_~i~0#1_424| 4294967296)))) (exists ((|v_ULTIMATE.start_main_~s~0#1_793| Int)) (<= 65026 (mod |v_ULTIMATE.start_main_~s~0#1_793| 4294967296))))' at error location [2024-11-14 04:49:00,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:49:00,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:49:00,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 192 [2024-11-14 04:49:00,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504186111] [2024-11-14 04:49:00,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:49:00,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2024-11-14 04:49:00,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:49:00,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2024-11-14 04:49:00,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18344, Invalid=19486, Unknown=0, NotChecked=0, Total=37830 [2024-11-14 04:49:00,891 INFO L87 Difference]: Start difference. First operand 200 states and 296 transitions. Second operand has 192 states, 192 states have (on average 1.03125) internal successors, (198), 192 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) [2024-11-14 04:49:02,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:49:02,881 INFO L93 Difference]: Finished difference Result 393 states and 488 transitions. [2024-11-14 04:49:02,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-11-14 04:49:02,882 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.03125) internal successors, (198), 192 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) Word has length 100 [2024-11-14 04:49:02,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:49:02,883 INFO L225 Difference]: With dead ends: 393 [2024-11-14 04:49:02,883 INFO L226 Difference]: Without dead ends: 199 [2024-11-14 04:49:02,885 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 200 SyntacticMatches, 3 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=18344, Invalid=19486, Unknown=0, NotChecked=0, Total=37830 [2024-11-14 04:49:02,886 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 822 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:49:02,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 21 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:49:02,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-11-14 04:49:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2024-11-14 04:49:02,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 197 states have (on average 1.0101522842639594) internal successors, (199), 198 states have internal predecessors, (199), 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) [2024-11-14 04:49:02,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2024-11-14 04:49:02,909 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 100 [2024-11-14 04:49:02,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:49:02,910 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2024-11-14 04:49:02,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.03125) internal successors, (198), 192 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) [2024-11-14 04:49:02,910 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2024-11-14 04:49:02,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-11-14 04:49:02,912 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:49:02,913 INFO L215 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1] [2024-11-14 04:49:02,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 04:49:03,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 04:49:03,113 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:49:03,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:49:03,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1689649027, now seen corresponding path program 7 times [2024-11-14 04:49:03,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:49:03,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892155425] [2024-11-14 04:49:03,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:49:03,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:49:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:49:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:49:52,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:49:52,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892155425] [2024-11-14 04:49:52,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892155425] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:49:52,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512280369] [2024-11-14 04:49:52,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:49:52,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:49:52,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:49:52,117 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:49:52,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:49:54,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:49:54,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 383 conjuncts are in the unsatisfiable core [2024-11-14 04:49:54,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:49:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:49:55,187 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:51:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:51:13,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512280369] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:51:13,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [453776472] [2024-11-14 04:51:13,281 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:51:13,281 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:51:13,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:51:13,281 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:51:13,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:51:13,324 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:51:20,402 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9504#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~s~0#1_1179| Int) (|v_ULTIMATE.start_main_~v~0#1_613| Int)) (<= (+ (mod |v_ULTIMATE.start_main_~s~0#1_1179| 4294967296) 1) (mod |v_ULTIMATE.start_main_~v~0#1_613| 256))) (exists ((|v_ULTIMATE.start_main_~i~0#1_619| Int) (|v_ULTIMATE.start_main_~n~0#1_24| Int)) (and (<= (mod |v_ULTIMATE.start_main_~n~0#1_24| 256) (mod |v_ULTIMATE.start_main_~i~0#1_619| 4294967296)) (<= 0 |v_ULTIMATE.start_main_~i~0#1_619|))))' at error location [2024-11-14 04:51:20,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:51:20,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:51:20,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2024-11-14 04:51:20,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463359456] [2024-11-14 04:51:20,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:51:20,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2024-11-14 04:51:20,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:51:20,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2024-11-14 04:51:20,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72981, Invalid=77948, Unknown=3, NotChecked=0, Total=150932 [2024-11-14 04:51:20,429 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 385 states have internal predecessors, (391), 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) [2024-11-14 04:52:55,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:52:55,532 INFO L93 Difference]: Finished difference Result 775 states and 1158 transitions. [2024-11-14 04:52:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 574 states. [2024-11-14 04:52:55,533 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 385 states have internal predecessors, (391), 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 195 [2024-11-14 04:52:55,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:52:55,536 INFO L225 Difference]: With dead ends: 775 [2024-11-14 04:52:55,536 INFO L226 Difference]: Without dead ends: 773 [2024-11-14 04:52:55,554 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1156 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 767 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129105 ImplicationChecksByTransitivity, 185.9s TimeCoverageRelationStatistics Valid=219281, Invalid=371308, Unknown=3, NotChecked=0, Total=590592 [2024-11-14 04:52:55,554 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 2146 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2146 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:52:55,554 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2146 Valid, 16 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 04:52:55,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2024-11-14 04:52:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 392. [2024-11-14 04:52:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 390 states have (on average 1.4974358974358974) internal successors, (584), 391 states have internal predecessors, (584), 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) [2024-11-14 04:52:55,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 584 transitions. [2024-11-14 04:52:55,591 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 584 transitions. Word has length 195 [2024-11-14 04:52:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:52:55,591 INFO L471 AbstractCegarLoop]: Abstraction has 392 states and 584 transitions. [2024-11-14 04:52:55,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 385 states have internal predecessors, (391), 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) [2024-11-14 04:52:55,592 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 584 transitions. [2024-11-14 04:52:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2024-11-14 04:52:55,594 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:52:55,594 INFO L215 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1] [2024-11-14 04:52:55,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 04:52:55,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:52:55,795 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:52:55,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:52:55,796 INFO L85 PathProgramCache]: Analyzing trace with hash 839516344, now seen corresponding path program 7 times [2024-11-14 04:52:55,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:52:55,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953548424] [2024-11-14 04:52:55,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:52:55,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:52:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:53:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:53:46,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:53:46,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953548424] [2024-11-14 04:53:46,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953548424] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:53:46,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941813631] [2024-11-14 04:53:46,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:53:46,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:53:46,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:53:46,121 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:53:46,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 04:53:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:53:47,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 383 conjuncts are in the unsatisfiable core [2024-11-14 04:53:47,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:53:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:53:48,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:53,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941813631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:54:53,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [433207053] [2024-11-14 04:54:53,231 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:54:53,231 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:54:53,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:54:53,231 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:54:53,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:54:53,298 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:54:54,587 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13755#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~s~0#1_1565| Int)) (<= 65026 (mod |v_ULTIMATE.start_main_~s~0#1_1565| 4294967296))) (exists ((|v_ULTIMATE.start_main_~i~0#1_814| Int) (|v_ULTIMATE.start_main_~n~0#1_25| Int)) (and (<= (mod |v_ULTIMATE.start_main_~n~0#1_25| 256) (mod |v_ULTIMATE.start_main_~i~0#1_814| 4294967296)) (<= 0 |v_ULTIMATE.start_main_~i~0#1_814|))))' at error location [2024-11-14 04:54:54,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:54:54,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:54:54,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 384 [2024-11-14 04:54:54,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270518932] [2024-11-14 04:54:54,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:54:54,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2024-11-14 04:54:54,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:54:54,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2024-11-14 04:54:54,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65669, Invalid=83713, Unknown=0, NotChecked=0, Total=149382 [2024-11-14 04:54:54,610 INFO L87 Difference]: Start difference. First operand 392 states and 584 transitions. Second operand has 384 states, 384 states have (on average 1.015625) internal successors, (390), 384 states have internal predecessors, (390), 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) [2024-11-14 04:54:56,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:56,881 INFO L93 Difference]: Finished difference Result 526 states and 717 transitions. [2024-11-14 04:54:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2024-11-14 04:54:56,882 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 384 states have (on average 1.015625) internal successors, (390), 384 states have internal predecessors, (390), 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 196 [2024-11-14 04:54:56,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:56,885 INFO L225 Difference]: With dead ends: 526 [2024-11-14 04:54:56,885 INFO L226 Difference]: Without dead ends: 392 [2024-11-14 04:54:56,893 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 780 GetRequests, 392 SyntacticMatches, 3 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26609 ImplicationChecksByTransitivity, 83.9s TimeCoverageRelationStatistics Valid=65669, Invalid=83713, Unknown=0, NotChecked=0, Total=149382 [2024-11-14 04:54:56,894 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 526 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:56,894 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 19 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 04:54:56,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2024-11-14 04:54:56,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2024-11-14 04:54:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 390 states have (on average 1.3282051282051281) internal successors, (518), 391 states have internal predecessors, (518), 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) [2024-11-14 04:54:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 518 transitions. [2024-11-14 04:54:56,941 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 518 transitions. Word has length 196 [2024-11-14 04:54:56,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:56,941 INFO L471 AbstractCegarLoop]: Abstraction has 392 states and 518 transitions. [2024-11-14 04:54:56,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 384 states have (on average 1.015625) internal successors, (390), 384 states have internal predecessors, (390), 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) [2024-11-14 04:54:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 518 transitions. [2024-11-14 04:54:56,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2024-11-14 04:54:56,946 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:56,946 INFO L215 NwaCegarLoop]: trace histogram [256, 1, 1, 1, 1, 1, 1] [2024-11-14 04:54:56,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 04:54:57,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 04:54:57,147 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:57,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:57,147 INFO L85 PathProgramCache]: Analyzing trace with hash -385651304, now seen corresponding path program 8 times [2024-11-14 04:54:57,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:54:57,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642511372] [2024-11-14 04:54:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:57,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:54:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:56:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 32896 backedges. 256 proven. 32640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:56:03,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:56:03,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642511372] [2024-11-14 04:56:03,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642511372] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:56:03,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424886143] [2024-11-14 04:56:03,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:56:03,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:56:03,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:56:03,255 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:56:03,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9238968d-877b-4f92-83ac-40ce4cc5f1ad/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 04:56:07,019 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 129 check-sat command(s) [2024-11-14 04:56:07,019 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:56:07,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 513 conjuncts are in the unsatisfiable core [2024-11-14 04:56:07,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:57:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 32896 backedges. 256 proven. 32640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:57:50,787 INFO L311 TraceCheckSpWp]: Computing backward predicates...