./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-c.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_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/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_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-c.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/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_b534e126-5b31-42c5-95b7-f62f6333e7ea/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 98c9a7161a25877cb0d3946df13d012bfde80051390422e2e164abf2e04cd600 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:40:04,962 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:40:05,062 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:40:05,068 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:40:05,069 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:40:05,103 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:40:05,105 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:40:05,105 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:40:05,105 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:40:05,106 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:40:05,106 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:40:05,107 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:40:05,107 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:40:05,107 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:40:05,107 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:40:05,107 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:40:05,107 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:40:05,108 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:40:05,108 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:40:05,108 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:40:05,109 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:40:05,109 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:40:05,109 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:40:05,110 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:40:05,110 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:40:05,110 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:40:05,110 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:40:05,110 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:40:05,110 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:40:05,110 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:40:05,110 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:40:05,111 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:40:05,111 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:40:05,111 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:40:05,111 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:40:05,112 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:40:05,112 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:40:05,112 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:40:05,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:40:05,112 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:40:05,112 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:40:05,112 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:40:05,112 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:40:05,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:40:05,113 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:40:05,113 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:40:05,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:40:05,113 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_b534e126-5b31-42c5-95b7-f62f6333e7ea/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 -> 98c9a7161a25877cb0d3946df13d012bfde80051390422e2e164abf2e04cd600 [2024-11-14 04:40:05,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:40:05,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:40:05,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:40:05,430 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:40:05,431 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:40:05,432 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-c.c Unable to find full path for "g++" [2024-11-14 04:40:07,454 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:40:07,710 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:40:07,710 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/sv-benchmarks/c/loop-invariants/linear-inequality-inv-c.c [2024-11-14 04:40:07,721 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/data/c7ae5a361/a50a94a38ddd48f89565fb74b5c3c5c9/FLAGe348bea5a [2024-11-14 04:40:08,019 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/data/c7ae5a361/a50a94a38ddd48f89565fb74b5c3c5c9 [2024-11-14 04:40:08,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:40:08,023 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:40:08,025 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:40:08,025 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:40:08,029 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:40:08,029 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:40:08" (1/1) ... [2024-11-14 04:40:08,030 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b6e3cc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:08, skipping insertion in model container [2024-11-14 04:40:08,030 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:40:08" (1/1) ... [2024-11-14 04:40:08,046 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:40:08,213 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_b534e126-5b31-42c5-95b7-f62f6333e7ea/sv-benchmarks/c/loop-invariants/linear-inequality-inv-c.c[866,879] [2024-11-14 04:40:08,217 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_b534e126-5b31-42c5-95b7-f62f6333e7ea/sv-benchmarks/c/loop-invariants/linear-inequality-inv-c.c[945,958] [2024-11-14 04:40:08,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:40:08,227 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:40:08,237 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_b534e126-5b31-42c5-95b7-f62f6333e7ea/sv-benchmarks/c/loop-invariants/linear-inequality-inv-c.c[866,879] [2024-11-14 04:40:08,238 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_b534e126-5b31-42c5-95b7-f62f6333e7ea/sv-benchmarks/c/loop-invariants/linear-inequality-inv-c.c[945,958] [2024-11-14 04:40:08,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:40:08,249 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:40:08,249 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:08 WrapperNode [2024-11-14 04:40:08,249 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:40:08,250 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:40:08,251 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:40:08,251 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:40:08,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:08" (1/1) ... [2024-11-14 04:40:08,262 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:08" (1/1) ... [2024-11-14 04:40:08,276 INFO L138 Inliner]: procedures = 11, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2024-11-14 04:40:08,277 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:40:08,277 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:40:08,277 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:40:08,277 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:40:08,284 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:08" (1/1) ... [2024-11-14 04:40:08,284 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:08" (1/1) ... [2024-11-14 04:40:08,285 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:08" (1/1) ... [2024-11-14 04:40:08,286 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:08" (1/1) ... [2024-11-14 04:40:08,288 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:08" (1/1) ... [2024-11-14 04:40:08,294 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:08" (1/1) ... [2024-11-14 04:40:08,298 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:08" (1/1) ... [2024-11-14 04:40:08,299 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:08" (1/1) ... [2024-11-14 04:40:08,300 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:40:08,304 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:40:08,304 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:40:08,304 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:40:08,305 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:08" (1/1) ... [2024-11-14 04:40:08,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:40:08,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:40:08,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:40:08,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:40:08,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:40:08,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:40:08,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:40:08,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:40:08,438 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:40:08,440 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:40:08,560 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-14 04:40:08,560 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:40:08,582 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:40:08,582 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 04:40:08,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:40:08 BoogieIcfgContainer [2024-11-14 04:40:08,583 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:40:08,584 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:40:08,584 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:40:08,591 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:40:08,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:40:08" (1/3) ... [2024-11-14 04:40:08,592 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70708273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:40:08, skipping insertion in model container [2024-11-14 04:40:08,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:40:08" (2/3) ... [2024-11-14 04:40:08,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70708273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:40:08, skipping insertion in model container [2024-11-14 04:40:08,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:40:08" (3/3) ... [2024-11-14 04:40:08,594 INFO L112 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-c.c [2024-11-14 04:40:08,612 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:40:08,615 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG linear-inequality-inv-c.c that has 1 procedures, 11 locations, 1 initial locations, 1 loop locations, and 2 error locations. [2024-11-14 04:40:08,678 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:40:08,694 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;@1fbbf753, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:40:08,695 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 04:40:08,699 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 04:40:08,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 04:40:08,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:08,705 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 04:40:08,705 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:08,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:08,710 INFO L85 PathProgramCache]: Analyzing trace with hash 62121635, now seen corresponding path program 1 times [2024-11-14 04:40:08,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:08,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331714045] [2024-11-14 04:40:08,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:08,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:08,996 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 04:40:08,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:08,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331714045] [2024-11-14 04:40:09,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331714045] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:40:09,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:40:09,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:40:09,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74081321] [2024-11-14 04:40:09,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:40:09,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:40:09,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:09,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:40:09,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:40:09,035 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 04:40:09,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:09,065 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2024-11-14 04:40:09,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:40:09,068 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 04:40:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:09,074 INFO L225 Difference]: With dead ends: 20 [2024-11-14 04:40:09,074 INFO L226 Difference]: Without dead ends: 10 [2024-11-14 04:40:09,077 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 04:40:09,079 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 04:40:09,083 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 04:40:09,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-14 04:40:09,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-11-14 04:40:09,113 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 04:40:09,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2024-11-14 04:40:09,117 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2024-11-14 04:40:09,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:09,118 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2024-11-14 04:40:09,118 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 04:40:09,119 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2024-11-14 04:40:09,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 04:40:09,121 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:09,121 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 04:40:09,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:40:09,122 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:09,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:09,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1925101820, now seen corresponding path program 1 times [2024-11-14 04:40:09,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:09,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029965580] [2024-11-14 04:40:09,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:09,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:09,324 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 04:40:09,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:09,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029965580] [2024-11-14 04:40:09,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029965580] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:40:09,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36986574] [2024-11-14 04:40:09,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:09,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:09,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:40:09,328 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:40:09,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:40:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:09,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:40:09,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:40:09,443 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 04:40:09,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:40:09,709 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 04:40:09,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36986574] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:40:09,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [850620303] [2024-11-14 04:40:09,728 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:40:09,728 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:40:09,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:40:09,735 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:40:09,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:40:09,959 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:40:16,575 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '90#(and (<= 1 |#StackHeapBarrier|) (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| 65536))) (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| 65536) (mod |v_ULTIMATE.start_main_~i~0#1_16| 4294967296)))))' at error location [2024-11-14 04:40:16,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:40:16,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:40:16,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-14 04:40:16,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515080325] [2024-11-14 04:40:16,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:40:16,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:40:16,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:16,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:40:16,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=80, Unknown=3, NotChecked=0, Total=110 [2024-11-14 04:40:16,579 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 04:40:16,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:16,672 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2024-11-14 04:40:16,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:40:16,673 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 04:40:16,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:16,673 INFO L225 Difference]: With dead ends: 19 [2024-11-14 04:40:16,674 INFO L226 Difference]: Without dead ends: 17 [2024-11-14 04:40:16,674 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=41, Invalid=112, Unknown=3, NotChecked=0, Total=156 [2024-11-14 04:40:16,675 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, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:16,675 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 8 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:40:16,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-14 04:40:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2024-11-14 04:40:16,679 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 04:40:16,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2024-11-14 04:40:16,680 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 6 [2024-11-14 04:40:16,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:16,680 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2024-11-14 04:40:16,680 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 04:40:16,680 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2024-11-14 04:40:16,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 04:40:16,681 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:16,681 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:40:16,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:40:16,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:16,882 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:16,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:16,882 INFO L85 PathProgramCache]: Analyzing trace with hash -451381665, now seen corresponding path program 1 times [2024-11-14 04:40:16,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:16,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178740036] [2024-11-14 04:40:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:16,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:17,014 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 04:40:17,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:17,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178740036] [2024-11-14 04:40:17,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178740036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:40:17,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234628987] [2024-11-14 04:40:17,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:17,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:17,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:40:17,016 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:40:17,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:40:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:17,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:40:17,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:40:17,088 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 04:40:17,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:40:17,148 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 04:40:17,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234628987] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:40:17,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1538553803] [2024-11-14 04:40:17,150 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:40:17,150 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:40:17,151 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:40:17,151 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:40:17,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:40:17,279 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:40:17,407 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '183#(and (<= 1 |#StackHeapBarrier|) (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| 65536) (mod |v_ULTIMATE.start_main_~i~0#1_22| 4294967296)) (<= 0 |v_ULTIMATE.start_main_~i~0#1_22|))) (exists ((|v_ULTIMATE.start_main_~s~0#1_29| Int)) (<= 4294836226 (mod |v_ULTIMATE.start_main_~s~0#1_29| 4294967296))))' at error location [2024-11-14 04:40:17,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:40:17,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:40:17,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-14 04:40:17,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941589474] [2024-11-14 04:40:17,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:40:17,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:40:17,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:17,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:40:17,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:40:17,409 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 04:40:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:17,456 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2024-11-14 04:40:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:40:17,457 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 04:40:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:17,458 INFO L225 Difference]: With dead ends: 21 [2024-11-14 04:40:17,458 INFO L226 Difference]: Without dead ends: 13 [2024-11-14 04:40:17,458 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 04:40:17,459 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 04:40:17,459 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 04:40:17,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-14 04:40:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-14 04:40:17,463 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 04:40:17,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2024-11-14 04:40:17,463 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2024-11-14 04:40:17,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:17,464 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2024-11-14 04:40:17,464 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 04:40:17,464 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2024-11-14 04:40:17,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 04:40:17,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:17,464 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2024-11-14 04:40:17,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 04:40:17,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-14 04:40:17,669 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:17,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:17,670 INFO L85 PathProgramCache]: Analyzing trace with hash -654166813, now seen corresponding path program 2 times [2024-11-14 04:40:17,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:17,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298282244] [2024-11-14 04:40:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:17,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:18,019 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 04:40:18,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:18,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298282244] [2024-11-14 04:40:18,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298282244] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:40:18,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659355370] [2024-11-14 04:40:18,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:40:18,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:18,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:40:18,022 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:40:18,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:40:18,090 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:40:18,090 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:40:18,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 04:40:18,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:40:18,183 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 04:40:18,183 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:40:18,470 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 04:40:18,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659355370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:40:18,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [247728503] [2024-11-14 04:40:18,472 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:40:18,472 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:40:18,472 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:40:18,472 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:40:18,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:40:18,555 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:40:25,040 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| 65536))) (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| 65536) (mod |v_ULTIMATE.start_main_~i~0#1_31| 4294967296)))))' at error location [2024-11-14 04:40:25,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:40:25,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:40:25,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-14 04:40:25,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852789916] [2024-11-14 04:40:25,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:40:25,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 04:40:25,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:25,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 04:40:25,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=200, Unknown=3, NotChecked=0, Total=272 [2024-11-14 04:40:25,043 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 04:40:25,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:25,349 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2024-11-14 04:40:25,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 04:40:25,350 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 04:40:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:25,351 INFO L225 Difference]: With dead ends: 33 [2024-11-14 04:40:25,351 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 04:40:25,351 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=173, Invalid=424, Unknown=3, NotChecked=0, Total=600 [2024-11-14 04:40:25,352 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:25,353 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 12 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:40:25,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 04:40:25,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2024-11-14 04:40:25,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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 04:40:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-11-14 04:40:25,358 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2024-11-14 04:40:25,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:25,358 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-11-14 04:40:25,358 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 04:40:25,358 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-11-14 04:40:25,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 04:40:25,359 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:25,359 INFO L215 NwaCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2024-11-14 04:40:25,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:40:25,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-14 04:40:25,563 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:25,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:25,564 INFO L85 PathProgramCache]: Analyzing trace with hash 434966808, now seen corresponding path program 2 times [2024-11-14 04:40:25,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:25,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806311477] [2024-11-14 04:40:25,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:25,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:40:26,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:26,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806311477] [2024-11-14 04:40:26,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806311477] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:40:26,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358835758] [2024-11-14 04:40:26,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:40:26,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:26,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:40:26,034 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:40:26,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:40:26,111 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 04:40:26,111 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:40:26,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 04:40:26,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:40:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:40:26,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:40:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:40:26,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358835758] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:40:26,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [287586040] [2024-11-14 04:40:26,748 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:40:26,748 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:40:26,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:40:26,748 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:40:26,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:40:26,826 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:40:26,999 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '484#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_44| Int) (|v_ULTIMATE.start_main_~n~0#1_15| Int)) (and (<= (mod |v_ULTIMATE.start_main_~n~0#1_15| 65536) (mod |v_ULTIMATE.start_main_~i~0#1_44| 4294967296)) (<= 0 |v_ULTIMATE.start_main_~i~0#1_44|))) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~s~0#1_65| Int)) (<= 4294836226 (mod |v_ULTIMATE.start_main_~s~0#1_65| 4294967296))))' at error location [2024-11-14 04:40:26,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:40:27,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:40:27,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2024-11-14 04:40:27,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231782187] [2024-11-14 04:40:27,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:40:27,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 04:40:27,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:27,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 04:40:27,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2024-11-14 04:40:27,001 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 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 04:40:27,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:27,116 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2024-11-14 04:40:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 04:40:27,117 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 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) Word has length 14 [2024-11-14 04:40:27,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:27,118 INFO L225 Difference]: With dead ends: 49 [2024-11-14 04:40:27,118 INFO L226 Difference]: Without dead ends: 35 [2024-11-14 04:40:27,119 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2024-11-14 04:40:27,122 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:27,123 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 8 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:40:27,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-14 04:40:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2024-11-14 04:40:27,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 27 states have internal predecessors, (36), 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 04:40:27,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2024-11-14 04:40:27,133 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 14 [2024-11-14 04:40:27,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:27,133 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2024-11-14 04:40:27,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 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 04:40:27,134 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2024-11-14 04:40:27,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 04:40:27,136 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:27,136 INFO L215 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2024-11-14 04:40:27,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 04:40:27,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:27,341 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:27,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:27,342 INFO L85 PathProgramCache]: Analyzing trace with hash 577539651, now seen corresponding path program 3 times [2024-11-14 04:40:27,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:27,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600944021] [2024-11-14 04:40:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:27,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:27,867 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 04:40:27,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:27,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600944021] [2024-11-14 04:40:27,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600944021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:40:27,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276851458] [2024-11-14 04:40:27,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:40:27,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:27,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:40:27,870 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:40:27,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:40:27,946 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:40:27,947 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:40:27,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 04:40:27,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:40:28,085 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 04:40:28,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:40:28,777 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 04:40:28,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276851458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:40:28,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1118470097] [2024-11-14 04:40:28,780 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:40:28,780 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:40:28,780 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:40:28,780 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:40:28,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:40:28,853 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:40:35,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '711#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~v~0#1_57| Int) (|v_ULTIMATE.start_main_~s~0#1_91| Int)) (<= (+ (mod |v_ULTIMATE.start_main_~s~0#1_91| 4294967296) 1) (mod |v_ULTIMATE.start_main_~v~0#1_57| 65536))) (exists ((|v_ULTIMATE.start_main_~i~0#1_59| Int) (|v_ULTIMATE.start_main_~n~0#1_16| Int)) (and (<= (mod |v_ULTIMATE.start_main_~n~0#1_16| 65536) (mod |v_ULTIMATE.start_main_~i~0#1_59| 4294967296)) (<= 0 |v_ULTIMATE.start_main_~i~0#1_59|))))' at error location [2024-11-14 04:40:35,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:40:35,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:40:35,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-14 04:40:35,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102893112] [2024-11-14 04:40:35,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:40:35,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 04:40:35,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:35,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 04:40:35,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=548, Unknown=3, NotChecked=0, Total=812 [2024-11-14 04:40:35,354 INFO L87 Difference]: Start difference. First operand 28 states and 36 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 04:40:36,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:36,143 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2024-11-14 04:40:36,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 04:40:36,144 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 04:40:36,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:36,145 INFO L225 Difference]: With dead ends: 50 [2024-11-14 04:40:36,145 INFO L226 Difference]: Without dead ends: 34 [2024-11-14 04:40:36,146 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=761, Invalid=1588, Unknown=3, NotChecked=0, Total=2352 [2024-11-14 04:40:36,149 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:36,150 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 18 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:40:36,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-14 04:40:36,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-11-14 04:40:36,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 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 04:40:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2024-11-14 04:40:36,157 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 15 [2024-11-14 04:40:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:36,158 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2024-11-14 04:40:36,158 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 04:40:36,158 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2024-11-14 04:40:36,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 04:40:36,158 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:36,159 INFO L215 NwaCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1] [2024-11-14 04:40:36,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:40:36,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 04:40:36,363 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:36,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:36,364 INFO L85 PathProgramCache]: Analyzing trace with hash -615145896, now seen corresponding path program 3 times [2024-11-14 04:40:36,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:36,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609838646] [2024-11-14 04:40:36,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:36,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:40:37,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:37,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609838646] [2024-11-14 04:40:37,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609838646] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:40:37,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598521049] [2024-11-14 04:40:37,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:40:37,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:37,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:40:37,546 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:40:37,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:40:37,689 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:40:37,689 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:40:37,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-14 04:40:37,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:40:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:40:37,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:40:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:40:39,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598521049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:40:39,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1422949020] [2024-11-14 04:40:39,257 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:40:39,257 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:40:39,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:40:39,258 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:40:39,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:40:39,325 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:40:39,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1077#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~s~0#1_137| Int)) (<= 4294836226 (mod |v_ULTIMATE.start_main_~s~0#1_137| 4294967296))) (exists ((|v_ULTIMATE.start_main_~n~0#1_17| Int) (|v_ULTIMATE.start_main_~i~0#1_84| Int)) (and (<= (mod |v_ULTIMATE.start_main_~n~0#1_17| 65536) (mod |v_ULTIMATE.start_main_~i~0#1_84| 4294967296)) (<= 0 |v_ULTIMATE.start_main_~i~0#1_84|))))' at error location [2024-11-14 04:40:39,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:40:39,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:40:39,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2024-11-14 04:40:39,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162198503] [2024-11-14 04:40:39,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:40:39,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 04:40:39,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:39,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 04:40:39,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 04:40:39,514 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 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 04:40:39,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:39,763 INFO L93 Difference]: Finished difference Result 97 states and 138 transitions. [2024-11-14 04:40:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 04:40:39,763 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 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 26 [2024-11-14 04:40:39,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:39,764 INFO L225 Difference]: With dead ends: 97 [2024-11-14 04:40:39,764 INFO L226 Difference]: Without dead ends: 71 [2024-11-14 04:40:39,765 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 04:40:39,766 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 100 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:39,766 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 14 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:40:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-14 04:40:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 52. [2024-11-14 04:40:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.44) internal successors, (72), 51 states have internal predecessors, (72), 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 04:40:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 72 transitions. [2024-11-14 04:40:39,780 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 72 transitions. Word has length 26 [2024-11-14 04:40:39,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:39,780 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 72 transitions. [2024-11-14 04:40:39,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 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 04:40:39,781 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 72 transitions. [2024-11-14 04:40:39,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 04:40:39,781 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:39,781 INFO L215 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2024-11-14 04:40:39,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:40:39,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 04:40:39,982 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:39,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:39,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1911183101, now seen corresponding path program 4 times [2024-11-14 04:40:39,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:39,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388265842] [2024-11-14 04:40:39,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:39,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:41,110 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 04:40:41,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:41,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388265842] [2024-11-14 04:40:41,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388265842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:40:41,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094811954] [2024-11-14 04:40:41,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:40:41,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:41,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:40:41,112 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:40:41,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:40:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:41,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-14 04:40:41,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:40:41,363 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 04:40:41,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:40:42,987 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 04:40:42,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094811954] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:40:42,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2048762349] [2024-11-14 04:40:42,990 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:40:42,990 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:40:42,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:40:42,990 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:40:42,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:40:43,047 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:40:49,623 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1520#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~n~0#1_18| Int) (|v_ULTIMATE.start_main_~i~0#1_111| Int)) (and (<= 0 |v_ULTIMATE.start_main_~i~0#1_111|) (<= (mod |v_ULTIMATE.start_main_~n~0#1_18| 65536) (mod |v_ULTIMATE.start_main_~i~0#1_111| 4294967296)))) (exists ((|v_ULTIMATE.start_main_~s~0#1_187| Int) (|v_ULTIMATE.start_main_~v~0#1_108| Int)) (<= (+ (mod |v_ULTIMATE.start_main_~s~0#1_187| 4294967296) 1) (mod |v_ULTIMATE.start_main_~v~0#1_108| 65536))))' at error location [2024-11-14 04:40:49,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:40:49,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:40:49,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-11-14 04:40:49,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534782358] [2024-11-14 04:40:49,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:40:49,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 04:40:49,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:49,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 04:40:49,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1077, Invalid=1676, Unknown=3, NotChecked=0, Total=2756 [2024-11-14 04:40:49,627 INFO L87 Difference]: Start difference. First operand 52 states and 72 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 04:40:51,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:51,633 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2024-11-14 04:40:51,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-14 04:40:51,633 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 04:40:51,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:51,634 INFO L225 Difference]: With dead ends: 86 [2024-11-14 04:40:51,634 INFO L226 Difference]: Without dead ends: 58 [2024-11-14 04:40:51,636 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=3233, Invalid=6076, Unknown=3, NotChecked=0, Total=9312 [2024-11-14 04:40:51,637 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 66 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:51,637 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 12 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:40:51,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-14 04:40:51,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2024-11-14 04:40:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 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 04:40:51,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2024-11-14 04:40:51,646 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 27 [2024-11-14 04:40:51,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:51,646 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2024-11-14 04:40:51,646 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 04:40:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2024-11-14 04:40:51,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 04:40:51,647 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:51,647 INFO L215 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1] [2024-11-14 04:40:51,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:40:51,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 04:40:51,850 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:40:51,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:51,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1006180568, now seen corresponding path program 4 times [2024-11-14 04:40:51,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:51,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088185912] [2024-11-14 04:40:51,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:51,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:40:55,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:55,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088185912] [2024-11-14 04:40:55,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088185912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:40:55,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82316908] [2024-11-14 04:40:55,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:40:55,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:55,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:40:55,391 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:40:55,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:40:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:55,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-14 04:40:55,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:40:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:40:55,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:41:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:41:00,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82316908] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:41:00,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [116891290] [2024-11-14 04:41:00,433 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:41:00,433 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:41:00,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:41:00,434 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:41:00,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:41:00,480 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:41:00,739 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2234#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~n~0#1_19| Int) (|v_ULTIMATE.start_main_~i~0#1_160| Int)) (and (<= 0 |v_ULTIMATE.start_main_~i~0#1_160|) (<= (mod |v_ULTIMATE.start_main_~n~0#1_19| 65536) (mod |v_ULTIMATE.start_main_~i~0#1_160| 4294967296)))) (exists ((|v_ULTIMATE.start_main_~s~0#1_281| Int)) (<= 4294836226 (mod |v_ULTIMATE.start_main_~s~0#1_281| 4294967296))))' at error location [2024-11-14 04:41:00,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:41:00,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:41:00,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 92 [2024-11-14 04:41:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962819323] [2024-11-14 04:41:00,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:41:00,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-11-14 04:41:00,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:41:00,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-11-14 04:41:00,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4194, Invalid=4736, Unknown=0, NotChecked=0, Total=8930 [2024-11-14 04:41:00,746 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 92 states, 92 states have (on average 1.065217391304348) internal successors, (98), 92 states have internal predecessors, (98), 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 04:41:01,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:41:01,163 INFO L93 Difference]: Finished difference Result 193 states and 282 transitions. [2024-11-14 04:41:01,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-11-14 04:41:01,164 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.065217391304348) internal successors, (98), 92 states have internal predecessors, (98), 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 50 [2024-11-14 04:41:01,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:41:01,166 INFO L225 Difference]: With dead ends: 193 [2024-11-14 04:41:01,166 INFO L226 Difference]: Without dead ends: 143 [2024-11-14 04:41:01,168 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4194, Invalid=4736, Unknown=0, NotChecked=0, Total=8930 [2024-11-14 04:41:01,168 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 260 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:41:01,169 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 12 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:41:01,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-14 04:41:01,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 100. [2024-11-14 04:41:01,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 98 states have (on average 1.469387755102041) internal successors, (144), 99 states have internal predecessors, (144), 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 04:41:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 144 transitions. [2024-11-14 04:41:01,183 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 144 transitions. Word has length 50 [2024-11-14 04:41:01,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:41:01,183 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 144 transitions. [2024-11-14 04:41:01,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.065217391304348) internal successors, (98), 92 states have internal predecessors, (98), 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 04:41:01,184 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 144 transitions. [2024-11-14 04:41:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-14 04:41:01,184 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:41:01,184 INFO L215 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2024-11-14 04:41:01,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 04:41:01,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 04:41:01,385 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:41:01,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:41:01,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1105297027, now seen corresponding path program 5 times [2024-11-14 04:41:01,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:41:01,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783231084] [2024-11-14 04:41:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:41:01,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:41:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:41:04,698 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 04:41:04,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:41:04,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783231084] [2024-11-14 04:41:04,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783231084] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:41:04,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361563718] [2024-11-14 04:41:04,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:41:04,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:41:04,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:41:04,701 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:41:04,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:41:04,952 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-11-14 04:41:04,952 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:41:04,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-14 04:41:04,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:41:05,287 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 04:41:05,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:41:10,557 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 04:41:10,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361563718] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:41:10,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [487211439] [2024-11-14 04:41:10,559 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:41:10,559 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:41:10,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:41:10,559 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:41:10,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:41:10,600 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:41:17,176 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3109#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~s~0#1_379| Int) (|v_ULTIMATE.start_main_~v~0#1_207| Int)) (<= (+ (mod |v_ULTIMATE.start_main_~s~0#1_379| 4294967296) 1) (mod |v_ULTIMATE.start_main_~v~0#1_207| 65536))) (exists ((|v_ULTIMATE.start_main_~i~0#1_211| Int) (|v_ULTIMATE.start_main_~n~0#1_20| Int)) (and (<= (mod |v_ULTIMATE.start_main_~n~0#1_20| 65536) (mod |v_ULTIMATE.start_main_~i~0#1_211| 4294967296)) (<= 0 |v_ULTIMATE.start_main_~i~0#1_211|))))' at error location [2024-11-14 04:41:17,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:41:17,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:41:17,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-11-14 04:41:17,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085122436] [2024-11-14 04:41:17,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:41:17,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-14 04:41:17,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:41:17,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-14 04:41:17,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4437, Invalid=5660, Unknown=3, NotChecked=0, Total=10100 [2024-11-14 04:41:17,181 INFO L87 Difference]: Start difference. First operand 100 states and 144 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 04:41:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:41:23,368 INFO L93 Difference]: Finished difference Result 158 states and 208 transitions. [2024-11-14 04:41:23,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2024-11-14 04:41:23,368 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 04:41:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:41:23,369 INFO L225 Difference]: With dead ends: 158 [2024-11-14 04:41:23,369 INFO L226 Difference]: Without dead ends: 106 [2024-11-14 04:41:23,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8073 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=13361, Invalid=23692, Unknown=3, NotChecked=0, Total=37056 [2024-11-14 04:41:23,376 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 154 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:41:23,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 18 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:41:23,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-14 04:41:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2024-11-14 04:41:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 103 states have internal predecessors, (106), 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 04:41:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2024-11-14 04:41:23,404 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 51 [2024-11-14 04:41:23,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:41:23,405 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2024-11-14 04:41:23,405 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 04:41:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2024-11-14 04:41:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-14 04:41:23,411 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:41:23,411 INFO L215 NwaCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1] [2024-11-14 04:41:23,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 04:41:23,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 04:41:23,612 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:41:23,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:41:23,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2025222696, now seen corresponding path program 5 times [2024-11-14 04:41:23,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:41:23,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727855946] [2024-11-14 04:41:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:41:23,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:41:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:41:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:41:37,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:41:37,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727855946] [2024-11-14 04:41:37,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727855946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:41:37,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333534758] [2024-11-14 04:41:37,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:41:37,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:41:37,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:41:37,044 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:41:37,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:41:37,788 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2024-11-14 04:41:37,788 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:41:37,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 187 conjuncts are in the unsatisfiable core [2024-11-14 04:41:37,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:41:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:41:38,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:42:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:42:00,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333534758] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:42:00,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [351031254] [2024-11-14 04:42:00,225 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:42:00,225 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:42:00,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:42:00,225 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:42:00,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:42:00,286 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:42:00,917 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4519#(and (exists ((|v_ULTIMATE.start_main_~n~0#1_21| Int) (|v_ULTIMATE.start_main_~i~0#1_308| Int)) (and (<= 0 |v_ULTIMATE.start_main_~i~0#1_308|) (<= (mod |v_ULTIMATE.start_main_~n~0#1_21| 65536) (mod |v_ULTIMATE.start_main_~i~0#1_308| 4294967296)))) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~s~0#1_569| Int)) (<= 4294836226 (mod |v_ULTIMATE.start_main_~s~0#1_569| 4294967296))))' at error location [2024-11-14 04:42:00,917 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:42:00,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:42:00,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 188 [2024-11-14 04:42:00,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355637677] [2024-11-14 04:42:00,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:42:00,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2024-11-14 04:42:00,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:00,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2024-11-14 04:42:00,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17586, Invalid=18704, Unknown=0, NotChecked=0, Total=36290 [2024-11-14 04:42:00,929 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 188 states, 188 states have (on average 1.0319148936170213) internal successors, (194), 188 states have internal predecessors, (194), 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 04:42:02,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:02,826 INFO L93 Difference]: Finished difference Result 385 states and 570 transitions. [2024-11-14 04:42:02,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2024-11-14 04:42:02,827 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 1.0319148936170213) internal successors, (194), 188 states have internal predecessors, (194), 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 98 [2024-11-14 04:42:02,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:02,829 INFO L225 Difference]: With dead ends: 385 [2024-11-14 04:42:02,829 INFO L226 Difference]: Without dead ends: 287 [2024-11-14 04:42:02,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 196 SyntacticMatches, 3 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=17586, Invalid=18704, Unknown=0, NotChecked=0, Total=36290 [2024-11-14 04:42:02,833 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 766 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:02,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 16 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 04:42:02,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-11-14 04:42:02,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 196. [2024-11-14 04:42:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 195 states have internal predecessors, (288), 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 04:42:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 288 transitions. [2024-11-14 04:42:02,861 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 288 transitions. Word has length 98 [2024-11-14 04:42:02,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:02,862 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 288 transitions. [2024-11-14 04:42:02,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 1.0319148936170213) internal successors, (194), 188 states have internal predecessors, (194), 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 04:42:02,862 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 288 transitions. [2024-11-14 04:42:02,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-14 04:42:02,864 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:02,864 INFO L215 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2024-11-14 04:42:02,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 04:42:03,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:03,065 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:42:03,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:03,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1621076355, now seen corresponding path program 6 times [2024-11-14 04:42:03,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:03,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877887403] [2024-11-14 04:42:03,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:03,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:14,285 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 04:42:14,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:14,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877887403] [2024-11-14 04:42:14,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877887403] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:42:14,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514599256] [2024-11-14 04:42:14,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:42:14,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:14,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:42:14,289 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:42:14,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:42:14,621 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:42:14,621 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:42:14,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-11-14 04:42:14,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:42:15,271 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 04:42:15,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:42:34,940 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 04:42:34,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514599256] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:42:34,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1870837045] [2024-11-14 04:42:34,941 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:42:34,941 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:42:34,942 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:42:34,942 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:42:34,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:42:34,977 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:42:41,881 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6258#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_407| Int) (|v_ULTIMATE.start_main_~n~0#1_22| Int)) (and (<= 0 |v_ULTIMATE.start_main_~i~0#1_407|) (<= (mod |v_ULTIMATE.start_main_~n~0#1_22| 65536) (mod |v_ULTIMATE.start_main_~i~0#1_407| 4294967296)))) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~s~0#1_763| Int) (|v_ULTIMATE.start_main_~v~0#1_402| Int)) (<= (+ 1 (mod |v_ULTIMATE.start_main_~s~0#1_763| 4294967296)) (mod |v_ULTIMATE.start_main_~v~0#1_402| 65536))))' at error location [2024-11-14 04:42:41,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:42:41,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:42:41,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2024-11-14 04:42:41,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030533721] [2024-11-14 04:42:41,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:42:41,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-11-14 04:42:41,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:41,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-11-14 04:42:41,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18069, Invalid=20540, Unknown=3, NotChecked=0, Total=38612 [2024-11-14 04:42:41,890 INFO L87 Difference]: Start difference. First operand 196 states and 288 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 04:43:06,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:43:06,799 INFO L93 Difference]: Finished difference Result 302 states and 400 transitions. [2024-11-14 04:43:06,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2024-11-14 04:43:06,800 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 04:43:06,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:43:06,802 INFO L225 Difference]: With dead ends: 302 [2024-11-14 04:43:06,802 INFO L226 Difference]: Without dead ends: 202 [2024-11-14 04:43:06,806 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32289 ImplicationChecksByTransitivity, 54.1s TimeCoverageRelationStatistics Valid=54353, Invalid=93484, Unknown=3, NotChecked=0, Total=147840 [2024-11-14 04:43:06,807 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 325 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:43:06,807 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 24 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 04:43:06,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-14 04:43:06,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2024-11-14 04:43:06,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 198 states have (on average 1.02020202020202) internal successors, (202), 199 states have internal predecessors, (202), 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 04:43:06,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2024-11-14 04:43:06,840 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 99 [2024-11-14 04:43:06,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:43:06,840 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2024-11-14 04:43:06,841 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 04:43:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2024-11-14 04:43:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2024-11-14 04:43:06,844 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:43:06,844 INFO L215 NwaCegarLoop]: trace histogram [188, 1, 1, 1, 1, 1, 1] [2024-11-14 04:43:06,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:43:07,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:07,045 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:43:07,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:43:07,046 INFO L85 PathProgramCache]: Analyzing trace with hash 470841304, now seen corresponding path program 6 times [2024-11-14 04:43:07,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:43:07,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231434036] [2024-11-14 04:43:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:43:07,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:43:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:44:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17766 backedges. 0 proven. 17766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:44:03,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:44:03,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231434036] [2024-11-14 04:44:03,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231434036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:44:03,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577348697] [2024-11-14 04:44:03,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:44:03,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:44:03,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:44:03,907 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:44:03,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:44:05,594 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:44:05,594 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:44:05,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 379 conjuncts are in the unsatisfiable core [2024-11-14 04:44:05,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:44:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17766 backedges. 0 proven. 17766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:44:06,665 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:45:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17766 backedges. 0 proven. 17766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:45:30,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577348697] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:45:30,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [282101012] [2024-11-14 04:45:30,120 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:45:30,120 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:45:30,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:45:30,121 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:45:30,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:45:30,169 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:45:31,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9060#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~s~0#1_1145| Int)) (<= 4294836226 (mod |v_ULTIMATE.start_main_~s~0#1_1145| 4294967296))) (exists ((|v_ULTIMATE.start_main_~i~0#1_600| Int) (|v_ULTIMATE.start_main_~n~0#1_23| Int)) (and (<= 0 |v_ULTIMATE.start_main_~i~0#1_600|) (<= (mod |v_ULTIMATE.start_main_~n~0#1_23| 65536) (mod |v_ULTIMATE.start_main_~i~0#1_600| 4294967296)))))' at error location [2024-11-14 04:45:31,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:45:31,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:45:31,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 380 [2024-11-14 04:45:31,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439538641] [2024-11-14 04:45:31,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:45:31,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 380 states [2024-11-14 04:45:31,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:45:31,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 380 interpolants. [2024-11-14 04:45:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72018, Invalid=74288, Unknown=0, NotChecked=0, Total=146306 [2024-11-14 04:45:31,323 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand has 380 states, 380 states have (on average 1.0157894736842106) internal successors, (386), 380 states have internal predecessors, (386), 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 04:45:46,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:45:46,897 INFO L93 Difference]: Finished difference Result 769 states and 1146 transitions. [2024-11-14 04:45:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 380 states. [2024-11-14 04:45:46,899 INFO L78 Accepts]: Start accepts. Automaton has has 380 states, 380 states have (on average 1.0157894736842106) internal successors, (386), 380 states have internal predecessors, (386), 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 194 [2024-11-14 04:45:46,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:45:46,901 INFO L225 Difference]: With dead ends: 769 [2024-11-14 04:45:46,901 INFO L226 Difference]: Without dead ends: 575 [2024-11-14 04:45:46,907 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 388 SyntacticMatches, 3 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2829 ImplicationChecksByTransitivity, 105.0s TimeCoverageRelationStatistics Valid=72018, Invalid=74288, Unknown=0, NotChecked=0, Total=146306 [2024-11-14 04:45:46,908 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 1618 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1618 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:45:46,908 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1618 Valid, 16 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 04:45:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2024-11-14 04:45:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 388. [2024-11-14 04:45:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 386 states have (on average 1.4922279792746114) internal successors, (576), 387 states have internal predecessors, (576), 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 04:45:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 576 transitions. [2024-11-14 04:45:46,935 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 576 transitions. Word has length 194 [2024-11-14 04:45:46,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:45:46,936 INFO L471 AbstractCegarLoop]: Abstraction has 388 states and 576 transitions. [2024-11-14 04:45:46,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 380 states, 380 states have (on average 1.0157894736842106) internal successors, (386), 380 states have internal predecessors, (386), 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 04:45:46,936 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 576 transitions. [2024-11-14 04:45:46,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-11-14 04:45:46,939 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:45:46,939 INFO L215 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1] [2024-11-14 04:45:46,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 04:45:47,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:45:47,139 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:45:47,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:45:47,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1689649027, now seen corresponding path program 7 times [2024-11-14 04:45:47,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:45:47,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115100416] [2024-11-14 04:45:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:45:47,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:45:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:34,936 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 04:46:34,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:46:34,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115100416] [2024-11-14 04:46:34,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115100416] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:46:34,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985557667] [2024-11-14 04:46:34,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:46:34,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:34,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:46:34,941 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:46:34,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:46:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:36,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 383 conjuncts are in the unsatisfiable core [2024-11-14 04:46:36,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:46:37,825 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 04:46:37,826 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:48:08,108 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 04:48:08,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985557667] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:48:08,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1841646691] [2024-11-14 04:48:08,109 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:48:08,110 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:48:08,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:48:08,110 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:48:08,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:48:08,159 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:48:15,400 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12527#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~0#1_795| Int) (|v_ULTIMATE.start_main_~n~0#1_24| Int)) (and (<= (mod |v_ULTIMATE.start_main_~n~0#1_24| 65536) (mod |v_ULTIMATE.start_main_~i~0#1_795| 4294967296)) (<= 0 |v_ULTIMATE.start_main_~i~0#1_795|))) (exists ((|v_ULTIMATE.start_main_~s~0#1_1531| Int) (|v_ULTIMATE.start_main_~v~0#1_789| Int)) (<= (+ (mod |v_ULTIMATE.start_main_~s~0#1_1531| 4294967296) 1) (mod |v_ULTIMATE.start_main_~v~0#1_789| 65536))))' at error location [2024-11-14 04:48:15,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:48:15,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:48:15,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2024-11-14 04:48:15,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293419591] [2024-11-14 04:48:15,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:48:15,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2024-11-14 04:48:15,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:48:15,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2024-11-14 04:48:15,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72981, Invalid=77948, Unknown=3, NotChecked=0, Total=150932 [2024-11-14 04:48:15,418 INFO L87 Difference]: Start difference. First operand 388 states and 576 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 04:50:00,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:50:00,402 INFO L93 Difference]: Finished difference Result 590 states and 784 transitions. [2024-11-14 04:50:00,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 387 states. [2024-11-14 04:50:00,403 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 04:50:00,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:50:00,406 INFO L225 Difference]: With dead ends: 590 [2024-11-14 04:50:00,406 INFO L226 Difference]: Without dead ends: 394 [2024-11-14 04:50:00,433 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1156 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 767 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129105 ImplicationChecksByTransitivity, 209.4s TimeCoverageRelationStatistics Valid=219281, Invalid=371308, Unknown=3, NotChecked=0, Total=590592 [2024-11-14 04:50:00,434 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 1052 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:50:00,434 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1052 Valid, 22 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 04:50:00,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2024-11-14 04:50:00,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 392. [2024-11-14 04:50:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 390 states have (on average 1.0102564102564102) internal successors, (394), 391 states have internal predecessors, (394), 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 04:50:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 394 transitions. [2024-11-14 04:50:00,470 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 394 transitions. Word has length 195 [2024-11-14 04:50:00,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:50:00,470 INFO L471 AbstractCegarLoop]: Abstraction has 392 states and 394 transitions. [2024-11-14 04:50:00,471 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 04:50:00,471 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 394 transitions. [2024-11-14 04:50:00,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2024-11-14 04:50:00,479 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:50:00,479 INFO L215 NwaCegarLoop]: trace histogram [380, 1, 1, 1, 1, 1, 1] [2024-11-14 04:50:00,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 04:50:00,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b534e126-5b31-42c5-95b7-f62f6333e7ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:50:00,679 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:50:00,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:50:00,680 INFO L85 PathProgramCache]: Analyzing trace with hash -298431528, now seen corresponding path program 7 times [2024-11-14 04:50:00,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:50:00,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336855010] [2024-11-14 04:50:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:50:00,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:50:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat