./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max20-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max20-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje --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 da9ac0c3f4abc9a6d9e8b4bf1276cf60fb65e65c55d9f94968d51682bf71ef87 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:44:46,274 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:44:46,403 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:44:46,443 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:44:46,444 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:44:46,510 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:44:46,511 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:44:46,511 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:44:46,512 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:44:46,513 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:44:46,513 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:44:46,514 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:44:46,514 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:44:46,515 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:44:46,516 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:44:46,516 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:44:46,517 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:44:46,517 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:44:46,518 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:44:46,519 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:44:46,519 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:44:46,520 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:44:46,521 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:44:46,522 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:44:46,522 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:44:46,523 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:44:46,523 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:44:46,523 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:44:46,524 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:44:46,524 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:44:46,525 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:44:46,525 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:44:46,525 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:44:46,526 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:44:46,526 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:44:46,527 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:44:46,527 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:44:46,527 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:44:46,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:44:46,529 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:44:46,529 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:44:46,530 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:44:46,530 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:44:46,531 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:44:46,531 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:44:46,531 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:44:46,532 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:44:46,532 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da9ac0c3f4abc9a6d9e8b4bf1276cf60fb65e65c55d9f94968d51682bf71ef87 [2024-11-09 05:44:46,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:44:46,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:44:46,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:44:46,966 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:44:46,967 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:44:46,968 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/reducercommutativity/max20-1.i Unable to find full path for "g++" [2024-11-09 05:44:49,377 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:44:49,611 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:44:49,611 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/sv-benchmarks/c/reducercommutativity/max20-1.i [2024-11-09 05:44:49,647 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/data/fa6ef19ab/cc8b1600450947489ce3520d4f3aeaef/FLAG9a20eb952 [2024-11-09 05:44:49,668 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/data/fa6ef19ab/cc8b1600450947489ce3520d4f3aeaef [2024-11-09 05:44:49,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:44:49,673 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:44:49,675 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:44:49,675 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:44:49,683 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:44:49,685 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:44:49" (1/1) ... [2024-11-09 05:44:49,686 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@573991db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:44:49, skipping insertion in model container [2024-11-09 05:44:49,687 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:44:49" (1/1) ... [2024-11-09 05:44:49,713 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:44:50,002 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_ccb143f4-3040-4499-9119-e798a0d4525c/sv-benchmarks/c/reducercommutativity/max20-1.i[1290,1303] [2024-11-09 05:44:50,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:44:50,018 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:44:50,048 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_ccb143f4-3040-4499-9119-e798a0d4525c/sv-benchmarks/c/reducercommutativity/max20-1.i[1290,1303] [2024-11-09 05:44:50,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:44:50,069 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:44:50,069 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:44:50 WrapperNode [2024-11-09 05:44:50,070 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:44:50,071 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:44:50,071 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:44:50,071 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:44:50,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:44:50" (1/1) ... [2024-11-09 05:44:50,089 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:44:50" (1/1) ... [2024-11-09 05:44:50,113 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2024-11-09 05:44:50,114 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:44:50,115 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:44:50,115 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:44:50,116 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:44:50,127 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:44:50" (1/1) ... [2024-11-09 05:44:50,127 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:44:50" (1/1) ... [2024-11-09 05:44:50,130 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:44:50" (1/1) ... [2024-11-09 05:44:50,130 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:44:50" (1/1) ... [2024-11-09 05:44:50,138 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:44:50" (1/1) ... [2024-11-09 05:44:50,143 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:44:50" (1/1) ... [2024-11-09 05:44:50,144 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:44:50" (1/1) ... [2024-11-09 05:44:50,145 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:44:50" (1/1) ... [2024-11-09 05:44:50,148 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:44:50,149 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:44:50,150 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:44:50,150 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:44:50,151 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:44:50" (1/1) ... [2024-11-09 05:44:50,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:44:50,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:44:50,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:44:50,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:44:50,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:44:50,227 INFO L130 BoogieDeclarations]: Found specification of procedure max [2024-11-09 05:44:50,228 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2024-11-09 05:44:50,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:44:50,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:44:50,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:44:50,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:44:50,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:44:50,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:44:50,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:44:50,318 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:44:50,320 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:44:50,570 INFO L? ?]: Removed 22 outVars from TransFormulas that were not future-live. [2024-11-09 05:44:50,570 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:44:50,638 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:44:50,639 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:44:50,639 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:44:50 BoogieIcfgContainer [2024-11-09 05:44:50,640 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:44:50,644 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:44:50,644 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:44:50,649 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:44:50,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:44:49" (1/3) ... [2024-11-09 05:44:50,650 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408f51fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:44:50, skipping insertion in model container [2024-11-09 05:44:50,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:44:50" (2/3) ... [2024-11-09 05:44:50,651 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408f51fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:44:50, skipping insertion in model container [2024-11-09 05:44:50,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:44:50" (3/3) ... [2024-11-09 05:44:50,653 INFO L112 eAbstractionObserver]: Analyzing ICFG max20-1.i [2024-11-09 05:44:50,679 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:44:50,679 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:44:50,751 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:44:50,759 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;@16e91f4a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:44:50,759 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:44:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:44:50,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 05:44:50,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:50,773 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:44:50,774 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:44:50,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:50,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1016110697, now seen corresponding path program 1 times [2024-11-09 05:44:50,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:50,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425897073] [2024-11-09 05:44:50,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:50,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:44:51,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:44:51,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425897073] [2024-11-09 05:44:51,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425897073] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:44:51,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:44:51,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:44:51,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951606757] [2024-11-09 05:44:51,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:44:51,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:44:51,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:44:51,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:44:51,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:44:51,267 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 05:44:51,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:44:51,375 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2024-11-09 05:44:51,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:44:51,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-11-09 05:44:51,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:44:51,389 INFO L225 Difference]: With dead ends: 45 [2024-11-09 05:44:51,390 INFO L226 Difference]: Without dead ends: 23 [2024-11-09 05:44:51,394 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 [2024-11-09 05:44:51,404 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:44:51,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:44:51,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-09 05:44:51,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-09 05:44:51,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:44:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2024-11-09 05:44:51,468 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 25 [2024-11-09 05:44:51,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:44:51,469 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2024-11-09 05:44:51,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 05:44:51,473 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2024-11-09 05:44:51,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 05:44:51,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:51,477 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:44:51,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:44:51,478 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:44:51,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:51,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1799420700, now seen corresponding path program 1 times [2024-11-09 05:44:51,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:51,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908659867] [2024-11-09 05:44:51,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:51,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:44:51,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:44:51,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908659867] [2024-11-09 05:44:51,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908659867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:44:51,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416384730] [2024-11-09 05:44:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:51,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:51,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:44:51,749 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:44:51,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:44:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:51,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:44:51,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:44:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:44:51,976 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:44:51,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416384730] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:44:51,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:44:51,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-09 05:44:51,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107182195] [2024-11-09 05:44:51,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:44:51,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:44:51,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:44:51,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:44:51,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:44:51,981 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 05:44:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:44:52,011 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2024-11-09 05:44:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:44:52,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-11-09 05:44:52,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:44:52,013 INFO L225 Difference]: With dead ends: 41 [2024-11-09 05:44:52,013 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 05:44:52,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:44:52,016 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:44:52,017 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:44:52,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 05:44:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-09 05:44:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:44:52,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-11-09 05:44:52,025 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 27 [2024-11-09 05:44:52,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:44:52,026 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-11-09 05:44:52,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 05:44:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-11-09 05:44:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 05:44:52,028 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:52,028 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:44:52,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 05:44:52,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:52,233 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:44:52,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:52,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1989742077, now seen corresponding path program 1 times [2024-11-09 05:44:52,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:52,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193190218] [2024-11-09 05:44:52,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:52,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 05:44:52,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:44:52,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193190218] [2024-11-09 05:44:52,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193190218] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:44:52,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327850224] [2024-11-09 05:44:52,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:52,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:52,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:44:52,397 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:44:52,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:44:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:52,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:44:52,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:44:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:44:52,561 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:44:52,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327850224] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:44:52,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:44:52,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-09 05:44:52,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020349805] [2024-11-09 05:44:52,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:44:52,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:44:52,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:44:52,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:44:52,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:44:52,565 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 05:44:52,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:44:52,602 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2024-11-09 05:44:52,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:44:52,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-11-09 05:44:52,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:44:52,605 INFO L225 Difference]: With dead ends: 40 [2024-11-09 05:44:52,605 INFO L226 Difference]: Without dead ends: 27 [2024-11-09 05:44:52,606 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:44:52,608 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:44:52,609 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:44:52,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-09 05:44:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-09 05:44:52,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:44:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-09 05:44:52,617 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 33 [2024-11-09 05:44:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:44:52,619 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-09 05:44:52,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 05:44:52,619 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-09 05:44:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 05:44:52,621 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:52,621 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:44:52,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:44:52,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-09 05:44:52,825 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:44:52,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:52,826 INFO L85 PathProgramCache]: Analyzing trace with hash -910330136, now seen corresponding path program 1 times [2024-11-09 05:44:52,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:52,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537597975] [2024-11-09 05:44:52,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:52,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 05:44:53,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:44:53,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537597975] [2024-11-09 05:44:53,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537597975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:44:53,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483577588] [2024-11-09 05:44:53,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:53,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:53,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:44:53,211 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:44:53,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:44:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:53,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:44:53,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:44:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 05:44:53,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:44:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 05:44:53,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483577588] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:44:53,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1104491637] [2024-11-09 05:44:53,500 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:44:53,501 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:44:53,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:44:53,515 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:44:53,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:44:55,584 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-09 05:44:55,705 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:45:35,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '705#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret2~0#1_14| Int) (|v_ULTIMATE.start_main_~ret~1#1_14| Int) (|v_ULTIMATE.start_main_~ret5~0#1_14| Int)) (and (<= |v_ULTIMATE.start_main_~ret5~0#1_14| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_14| 2147483648)) (<= |v_ULTIMATE.start_main_~ret~1#1_14| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_14| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret~1#1_14| |v_ULTIMATE.start_main_~ret5~0#1_14|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_14| |v_ULTIMATE.start_main_~ret~1#1_14|))) (or (and (exists ((v_max_~x.offset_BEFORE_RETURN_6 Int) (v_max_~ret~0_34 Int) (v_max_~x.base_BEFORE_RETURN_6 Int)) (and (or (= (mod v_max_~ret~0_34 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_14| 4294967296)) (= (mod v_max_~ret~0_34 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_14|)) (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_6) (+ 76 v_max_~x.offset_BEFORE_RETURN_6)) v_max_~ret~0_34))) (exists ((|v_#memory_int_30| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_30| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_30| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76)))))) (and (exists ((|v_#memory_int_30| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_30| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_30| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76))))) (exists ((v_max_~ret~0_34 Int) (v_max_~x.offset_BEFORE_RETURN_5 Int) (v_max_~x.base_BEFORE_RETURN_5 Int)) (and (or (= (mod v_max_~ret~0_34 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_14| 4294967296)) (= (mod v_max_~ret~0_34 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_14|)) (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_5) (+ 76 v_max_~x.offset_BEFORE_RETURN_5)) v_max_~ret~0_34))))) (<= |v_ULTIMATE.start_main_~ret2~0#1_14| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_14| 2147483648)))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 05:45:35,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:45:35,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:45:35,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-11-09 05:45:35,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542333924] [2024-11-09 05:45:35,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:45:35,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:45:35,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:45:35,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:45:35,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=405, Unknown=29, NotChecked=0, Total=506 [2024-11-09 05:45:35,369 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 05:45:35,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:45:35,430 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2024-11-09 05:45:35,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:45:35,431 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 35 [2024-11-09 05:45:35,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:45:35,432 INFO L225 Difference]: With dead ends: 54 [2024-11-09 05:45:35,432 INFO L226 Difference]: Without dead ends: 32 [2024-11-09 05:45:35,433 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=72, Invalid=405, Unknown=29, NotChecked=0, Total=506 [2024-11-09 05:45:35,434 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:45:35,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:45:35,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-09 05:45:35,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-09 05:45:35,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:45:35,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-11-09 05:45:35,442 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 35 [2024-11-09 05:45:35,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:45:35,443 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-11-09 05:45:35,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 05:45:35,443 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-11-09 05:45:35,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 05:45:35,445 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:45:35,445 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:45:35,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 05:45:35,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:35,647 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:45:35,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:45:35,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1355494647, now seen corresponding path program 2 times [2024-11-09 05:45:35,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:45:35,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653494956] [2024-11-09 05:45:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:35,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:45:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-09 05:45:35,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:45:35,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653494956] [2024-11-09 05:45:35,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653494956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:45:35,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588675086] [2024-11-09 05:45:35,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:45:35,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:35,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:45:35,851 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:45:35,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:45:35,945 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:45:35,945 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:45:35,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:45:35,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:45:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-09 05:45:35,974 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:45:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-09 05:45:36,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588675086] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:45:36,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [469372150] [2024-11-09 05:45:36,027 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:45:36,028 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:45:36,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:45:36,029 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:45:36,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:45:37,044 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-09 05:45:37,118 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:46:00,170 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1091#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret2~0#1_15| Int) (|v_ULTIMATE.start_main_~ret~1#1_15| Int) (|v_ULTIMATE.start_main_~ret5~0#1_16| Int)) (and (<= |v_ULTIMATE.start_main_~ret2~0#1_15| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_15| 2147483648)) (<= |v_ULTIMATE.start_main_~ret5~0#1_16| 2147483647) (or (and (exists ((v_max_~x.offset_BEFORE_RETURN_11 Int) (v_max_~ret~0_57 Int) (v_max_~x.base_BEFORE_RETURN_11 Int)) (and (or (= (mod v_max_~ret~0_57 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_16| 4294967296)) (= |v_ULTIMATE.start_main_~ret5~0#1_16| (mod v_max_~ret~0_57 4294967296))) (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_11) (+ 76 v_max_~x.offset_BEFORE_RETURN_11)) v_max_~ret~0_57))) (exists ((|v_#memory_int_37| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_37| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_37| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76)))))) (and (exists ((v_max_~x.offset_BEFORE_RETURN_12 Int) (v_max_~ret~0_57 Int) (v_max_~x.base_BEFORE_RETURN_12 Int)) (and (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_12) (+ 76 v_max_~x.offset_BEFORE_RETURN_12)) v_max_~ret~0_57) (or (= (mod v_max_~ret~0_57 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_16| 4294967296)) (= |v_ULTIMATE.start_main_~ret5~0#1_16| (mod v_max_~ret~0_57 4294967296))))) (exists ((|v_#memory_int_37| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_37| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_37| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76))))))) (<= |v_ULTIMATE.start_main_~ret~1#1_15| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_16| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_15| |v_ULTIMATE.start_main_~ret~1#1_15|)) (not (= |v_ULTIMATE.start_main_~ret~1#1_15| |v_ULTIMATE.start_main_~ret5~0#1_16|))) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_15| 2147483648)))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 05:46:00,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:46:00,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:46:00,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-09 05:46:00,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577427225] [2024-11-09 05:46:00,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:46:00,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:46:00,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:46:00,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:46:00,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=440, Unknown=35, NotChecked=0, Total=552 [2024-11-09 05:46:00,174 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:46:00,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:46:00,233 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2024-11-09 05:46:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:46:00,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2024-11-09 05:46:00,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:46:00,236 INFO L225 Difference]: With dead ends: 57 [2024-11-09 05:46:00,236 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 05:46:00,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=77, Invalid=440, Unknown=35, NotChecked=0, Total=552 [2024-11-09 05:46:00,238 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:46:00,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:46:00,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 05:46:00,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-09 05:46:00,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:46:00,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-11-09 05:46:00,254 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 41 [2024-11-09 05:46:00,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:46:00,254 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-11-09 05:46:00,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:46:00,255 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-11-09 05:46:00,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-09 05:46:00,261 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:46:00,261 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:46:00,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:46:00,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:46:00,462 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:46:00,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:46:00,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1822142164, now seen corresponding path program 3 times [2024-11-09 05:46:00,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:46:00,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617406816] [2024-11-09 05:46:00,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:46:00,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:46:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:46:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-09 05:46:00,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:46:00,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617406816] [2024-11-09 05:46:00,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617406816] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:46:00,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427849919] [2024-11-09 05:46:00,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:46:00,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:46:00,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:46:00,626 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:46:00,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:46:00,766 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:46:00,767 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:46:00,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:46:00,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:46:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-11-09 05:46:00,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:46:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-11-09 05:46:00,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427849919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:46:00,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271333658] [2024-11-09 05:46:00,965 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:46:00,965 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:46:00,966 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:46:00,966 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:46:00,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:46:01,895 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-09 05:46:01,995 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:46:37,614 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1606#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret5~0#1_18| Int) (|v_ULTIMATE.start_main_~ret2~0#1_17| Int) (|v_ULTIMATE.start_main_~ret~1#1_17| Int)) (and (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_17| |v_ULTIMATE.start_main_~ret~1#1_17|)) (not (= |v_ULTIMATE.start_main_~ret~1#1_17| |v_ULTIMATE.start_main_~ret5~0#1_18|))) (or (and (exists ((|v_#memory_int_52| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_52| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_52| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76))))) (exists ((v_max_~x.base_BEFORE_RETURN_17 Int) (v_max_~ret~0_87 Int) (v_max_~x.offset_BEFORE_RETURN_17 Int)) (and (or (= (+ |v_ULTIMATE.start_main_~ret5~0#1_18| 4294967296) (mod v_max_~ret~0_87 4294967296)) (= |v_ULTIMATE.start_main_~ret5~0#1_18| (mod v_max_~ret~0_87 4294967296))) (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_17) (+ 76 v_max_~x.offset_BEFORE_RETURN_17)) v_max_~ret~0_87)))) (and (exists ((|v_#memory_int_52| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_52| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_52| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76))))) (exists ((v_max_~x.base_BEFORE_RETURN_18 Int) (v_max_~x.offset_BEFORE_RETURN_18 Int) (v_max_~ret~0_87 Int)) (and (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_18) (+ 76 v_max_~x.offset_BEFORE_RETURN_18)) v_max_~ret~0_87) (or (= (+ |v_ULTIMATE.start_main_~ret5~0#1_18| 4294967296) (mod v_max_~ret~0_87 4294967296)) (= |v_ULTIMATE.start_main_~ret5~0#1_18| (mod v_max_~ret~0_87 4294967296))))))) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_17| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_18| 2147483648)) (<= |v_ULTIMATE.start_main_~ret5~0#1_18| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_17| 2147483648)) (<= |v_ULTIMATE.start_main_~ret2~0#1_17| 2147483647) (<= |v_ULTIMATE.start_main_~ret~1#1_17| 2147483647))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 05:46:37,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:46:37,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:46:37,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2024-11-09 05:46:37,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406848669] [2024-11-09 05:46:37,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:46:37,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 05:46:37,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:46:37,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 05:46:37,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=721, Unknown=27, NotChecked=0, Total=870 [2024-11-09 05:46:37,619 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 05:46:37,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:46:37,728 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2024-11-09 05:46:37,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:46:37,729 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 59 [2024-11-09 05:46:37,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:46:37,730 INFO L225 Difference]: With dead ends: 78 [2024-11-09 05:46:37,731 INFO L226 Difference]: Without dead ends: 51 [2024-11-09 05:46:37,732 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=122, Invalid=721, Unknown=27, NotChecked=0, Total=870 [2024-11-09 05:46:37,733 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:46:37,733 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 68 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:46:37,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-09 05:46:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-09 05:46:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:46:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2024-11-09 05:46:37,742 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 59 [2024-11-09 05:46:37,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:46:37,743 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2024-11-09 05:46:37,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 05:46:37,743 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2024-11-09 05:46:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-09 05:46:37,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:46:37,746 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 10, 10, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:46:37,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:46:37,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 05:46:37,947 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:46:37,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:46:37,948 INFO L85 PathProgramCache]: Analyzing trace with hash -384968401, now seen corresponding path program 4 times [2024-11-09 05:46:37,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:46:37,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160506696] [2024-11-09 05:46:37,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:46:37,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:46:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:46:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-09 05:46:38,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:46:38,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160506696] [2024-11-09 05:46:38,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160506696] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:46:38,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929576397] [2024-11-09 05:46:38,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:46:38,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:46:38,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:46:38,484 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:46:38,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:46:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:46:38,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:46:38,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:46:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-09 05:46:38,712 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:46:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-09 05:46:39,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929576397] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:46:39,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [837680465] [2024-11-09 05:46:39,009 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:46:39,010 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:46:39,010 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:46:39,014 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:46:39,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:46:39,933 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-09 05:46:39,994 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:47:20,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2266#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~ret2~0#1_19| Int) (|v_ULTIMATE.start_main_~ret5~0#1_20| Int) (|v_ULTIMATE.start_main_~ret~1#1_19| Int)) (and (or (and (exists ((|v_#memory_int_74| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_74| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_74| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76))))) (exists ((v_max_~ret~0_117 Int) (v_max_~x.offset_BEFORE_RETURN_23 Int) (v_max_~x.base_BEFORE_RETURN_23 Int)) (and (or (= |v_ULTIMATE.start_main_~ret5~0#1_20| (mod v_max_~ret~0_117 4294967296)) (= (+ |v_ULTIMATE.start_main_~ret5~0#1_20| 4294967296) (mod v_max_~ret~0_117 4294967296))) (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_23) (+ 76 v_max_~x.offset_BEFORE_RETURN_23)) v_max_~ret~0_117)))) (and (exists ((|v_#memory_int_74| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_74| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_74| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76))))) (exists ((v_max_~ret~0_117 Int) (v_max_~x.offset_BEFORE_RETURN_24 Int) (v_max_~x.base_BEFORE_RETURN_24 Int)) (and (or (= |v_ULTIMATE.start_main_~ret5~0#1_20| (mod v_max_~ret~0_117 4294967296)) (= (+ |v_ULTIMATE.start_main_~ret5~0#1_20| 4294967296) (mod v_max_~ret~0_117 4294967296))) (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_24) (+ 76 v_max_~x.offset_BEFORE_RETURN_24)) v_max_~ret~0_117))))) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_19| 2147483648)) (<= |v_ULTIMATE.start_main_~ret5~0#1_20| 2147483647) (<= |v_ULTIMATE.start_main_~ret~1#1_19| 2147483647) (<= |v_ULTIMATE.start_main_~ret2~0#1_19| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_20| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_19| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_19| |v_ULTIMATE.start_main_~ret~1#1_19|)) (not (= |v_ULTIMATE.start_main_~ret~1#1_19| |v_ULTIMATE.start_main_~ret5~0#1_20|))))))' at error location [2024-11-09 05:47:20,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:47:20,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:47:20,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 23 [2024-11-09 05:47:20,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894390207] [2024-11-09 05:47:20,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:47:20,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 05:47:20,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:47:20,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 05:47:20,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1151, Unknown=27, NotChecked=0, Total=1482 [2024-11-09 05:47:20,166 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 05:47:20,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:47:20,289 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2024-11-09 05:47:20,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 05:47:20,289 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 73 [2024-11-09 05:47:20,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:47:20,294 INFO L225 Difference]: With dead ends: 100 [2024-11-09 05:47:20,294 INFO L226 Difference]: Without dead ends: 71 [2024-11-09 05:47:20,295 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=304, Invalid=1151, Unknown=27, NotChecked=0, Total=1482 [2024-11-09 05:47:20,296 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:47:20,296 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 59 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:47:20,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-09 05:47:20,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-09 05:47:20,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:47:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2024-11-09 05:47:20,319 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 73 [2024-11-09 05:47:20,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:47:20,320 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2024-11-09 05:47:20,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 05:47:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2024-11-09 05:47:20,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-09 05:47:20,327 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:47:20,327 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 12, 12, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:47:20,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:47:20,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:20,528 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:47:20,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:47:20,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1051371487, now seen corresponding path program 5 times [2024-11-09 05:47:20,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:47:20,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169188502] [2024-11-09 05:47:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:47:20,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:47:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:47:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2024-11-09 05:47:20,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:47:20,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169188502] [2024-11-09 05:47:20,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169188502] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:47:20,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071787621] [2024-11-09 05:47:20,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:47:20,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:20,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:47:20,918 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:47:20,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:47:21,076 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 05:47:21,076 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:47:21,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:47:21,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:47:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 88 proven. 4 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-11-09 05:47:21,129 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:47:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2024-11-09 05:47:21,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071787621] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:47:21,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1498259991] [2024-11-09 05:47:21,206 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:47:21,206 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:47:21,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:47:21,207 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:47:21,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:47:21,969 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-09 05:47:22,028 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:47:52,102 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3099#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret~1#1_20| Int) (|v_ULTIMATE.start_main_~ret2~0#1_21| Int) (|v_ULTIMATE.start_main_~ret5~0#1_22| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_22| 2147483648)) (<= |v_ULTIMATE.start_main_~ret2~0#1_21| 2147483647) (<= |v_ULTIMATE.start_main_~ret5~0#1_22| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_20| 2147483648)) (or (and (exists ((v_max_~x.base_BEFORE_RETURN_29 Int) (v_max_~x.offset_BEFORE_RETURN_29 Int) (v_max_~ret~0_147 Int)) (and (or (= |v_ULTIMATE.start_main_~ret5~0#1_22| (mod v_max_~ret~0_147 4294967296)) (= (+ |v_ULTIMATE.start_main_~ret5~0#1_22| 4294967296) (mod v_max_~ret~0_147 4294967296))) (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_29) (+ 76 v_max_~x.offset_BEFORE_RETURN_29)) v_max_~ret~0_147))) (exists ((|v_#memory_int_85| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_85| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_85| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76)))))) (and (exists ((|v_#memory_int_85| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_85| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_85| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76))))) (exists ((v_max_~x.offset_BEFORE_RETURN_30 Int) (v_max_~x.base_BEFORE_RETURN_30 Int) (v_max_~ret~0_147 Int)) (and (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_30) (+ 76 v_max_~x.offset_BEFORE_RETURN_30)) v_max_~ret~0_147) (or (= |v_ULTIMATE.start_main_~ret5~0#1_22| (mod v_max_~ret~0_147 4294967296)) (= (+ |v_ULTIMATE.start_main_~ret5~0#1_22| 4294967296) (mod v_max_~ret~0_147 4294967296))))))) (<= |v_ULTIMATE.start_main_~ret~1#1_20| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_21| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret~1#1_20| |v_ULTIMATE.start_main_~ret5~0#1_22|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_21| |v_ULTIMATE.start_main_~ret~1#1_20|))))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 05:47:52,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:47:52,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:47:52,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2024-11-09 05:47:52,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705245401] [2024-11-09 05:47:52,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:47:52,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:47:52,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:47:52,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:47:52,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=724, Unknown=41, NotChecked=0, Total=870 [2024-11-09 05:47:52,106 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:47:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:47:52,203 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2024-11-09 05:47:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:47:52,204 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 93 [2024-11-09 05:47:52,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:47:52,205 INFO L225 Difference]: With dead ends: 108 [2024-11-09 05:47:52,205 INFO L226 Difference]: Without dead ends: 81 [2024-11-09 05:47:52,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=105, Invalid=724, Unknown=41, NotChecked=0, Total=870 [2024-11-09 05:47:52,207 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:47:52,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 85 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:47:52,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-09 05:47:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2024-11-09 05:47:52,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:47:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2024-11-09 05:47:52,219 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 93 [2024-11-09 05:47:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:47:52,219 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2024-11-09 05:47:52,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:47:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2024-11-09 05:47:52,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-09 05:47:52,222 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:47:52,222 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 15, 15, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:47:52,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:47:52,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:52,423 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:47:52,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:47:52,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1587351132, now seen corresponding path program 6 times [2024-11-09 05:47:52,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:47:52,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937356392] [2024-11-09 05:47:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:47:52,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:47:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:47:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-11-09 05:47:52,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:47:52,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937356392] [2024-11-09 05:47:52,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937356392] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:47:52,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376028636] [2024-11-09 05:47:52,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:47:52,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:52,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:47:52,791 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:47:52,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:47:53,016 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:47:53,016 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:47:53,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:47:53,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:47:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2024-11-09 05:47:53,072 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:47:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-11-09 05:47:53,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376028636] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:47:53,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1629576172] [2024-11-09 05:47:53,214 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:47:53,214 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:47:53,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:47:53,215 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:47:53,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:47:53,825 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-09 05:47:53,883 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:48:29,890 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4045#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~ret~1#1_22| Int) (|v_ULTIMATE.start_main_~ret2~0#1_23| Int) (|v_ULTIMATE.start_main_~ret5~0#1_24| Int)) (and (<= |v_ULTIMATE.start_main_~ret2~0#1_23| 2147483647) (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_23| |v_ULTIMATE.start_main_~ret~1#1_22|)) (not (= |v_ULTIMATE.start_main_~ret~1#1_22| |v_ULTIMATE.start_main_~ret5~0#1_24|))) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_23| 2147483648)) (<= |v_ULTIMATE.start_main_~ret~1#1_22| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_24| 2147483648)) (or (and (exists ((|v_#memory_int_101| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_101| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_101| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76))))) (exists ((v_max_~x.offset_BEFORE_RETURN_35 Int) (v_max_~x.base_BEFORE_RETURN_35 Int) (v_max_~ret~0_186 Int)) (and (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_35) (+ 76 v_max_~x.offset_BEFORE_RETURN_35)) v_max_~ret~0_186) (or (= (mod v_max_~ret~0_186 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_24| 4294967296)) (= (mod v_max_~ret~0_186 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_24|))))) (and (exists ((|v_#memory_int_101| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_101| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_101| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76))))) (exists ((v_max_~x.offset_BEFORE_RETURN_36 Int) (v_max_~x.base_BEFORE_RETURN_36 Int) (v_max_~ret~0_186 Int)) (and (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_36) (+ 76 v_max_~x.offset_BEFORE_RETURN_36)) v_max_~ret~0_186) (or (= (mod v_max_~ret~0_186 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_24| 4294967296)) (= (mod v_max_~ret~0_186 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_24|)))))) (<= |v_ULTIMATE.start_main_~ret5~0#1_24| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_22| 2147483648)))))' at error location [2024-11-09 05:48:29,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:48:29,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:48:29,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-09 05:48:29,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517108456] [2024-11-09 05:48:29,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:48:29,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 05:48:29,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:48:29,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 05:48:29,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=749, Unknown=26, NotChecked=0, Total=930 [2024-11-09 05:48:29,893 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:48:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:48:29,946 INFO L93 Difference]: Finished difference Result 130 states and 146 transitions. [2024-11-09 05:48:29,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:48:29,946 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 107 [2024-11-09 05:48:29,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:48:29,948 INFO L225 Difference]: With dead ends: 130 [2024-11-09 05:48:29,948 INFO L226 Difference]: Without dead ends: 94 [2024-11-09 05:48:29,948 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 36.1s TimeCoverageRelationStatistics Valid=155, Invalid=749, Unknown=26, NotChecked=0, Total=930 [2024-11-09 05:48:29,949 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:48:29,950 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 59 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:48:29,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-09 05:48:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-11-09 05:48:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:48:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2024-11-09 05:48:29,962 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 107 [2024-11-09 05:48:29,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:48:29,963 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2024-11-09 05:48:29,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:48:29,963 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2024-11-09 05:48:29,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-09 05:48:29,969 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:48:29,970 INFO L215 NwaCegarLoop]: trace histogram [36, 36, 20, 20, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:48:29,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 05:48:30,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 05:48:30,170 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:48:30,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:48:30,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1804303251, now seen corresponding path program 7 times [2024-11-09 05:48:30,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:48:30,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405269335] [2024-11-09 05:48:30,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:48:30,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:48:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:48:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1816 backedges. 0 proven. 774 refuted. 0 times theorem prover too weak. 1042 trivial. 0 not checked. [2024-11-09 05:48:31,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:48:31,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405269335] [2024-11-09 05:48:31,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405269335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:48:31,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371580689] [2024-11-09 05:48:31,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:48:31,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:48:31,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:48:31,020 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:48:31,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:48:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:48:31,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:48:31,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:48:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1816 backedges. 628 proven. 144 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2024-11-09 05:48:31,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:48:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1816 backedges. 0 proven. 774 refuted. 0 times theorem prover too weak. 1042 trivial. 0 not checked. [2024-11-09 05:48:31,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371580689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:48:31,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [362555955] [2024-11-09 05:48:31,676 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:48:31,676 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:48:31,677 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:48:31,677 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:48:31,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:48:32,283 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-09 05:48:32,328 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:49:12,341 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5305#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~ret2~0#1_25| Int) (|v_ULTIMATE.start_main_~ret~1#1_24| Int) (|v_ULTIMATE.start_main_~ret5~0#1_26| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_25| 2147483648)) (or (and (exists ((v_max_~x.offset_BEFORE_RETURN_41 Int) (v_max_~ret~0_253 Int) (v_max_~x.base_BEFORE_RETURN_41 Int)) (and (or (= |v_ULTIMATE.start_main_~ret5~0#1_26| (mod v_max_~ret~0_253 4294967296)) (= (+ |v_ULTIMATE.start_main_~ret5~0#1_26| 4294967296) (mod v_max_~ret~0_253 4294967296))) (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_41) (+ 76 v_max_~x.offset_BEFORE_RETURN_41)) v_max_~ret~0_253))) (exists ((|v_#memory_int_117| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_117| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_117| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76)))))) (and (exists ((v_max_~x.offset_BEFORE_RETURN_42 Int) (v_max_~ret~0_253 Int) (v_max_~x.base_BEFORE_RETURN_42 Int)) (and (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_42) (+ 76 v_max_~x.offset_BEFORE_RETURN_42)) v_max_~ret~0_253) (or (= |v_ULTIMATE.start_main_~ret5~0#1_26| (mod v_max_~ret~0_253 4294967296)) (= (+ |v_ULTIMATE.start_main_~ret5~0#1_26| 4294967296) (mod v_max_~ret~0_253 4294967296))))) (exists ((|v_#memory_int_117| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_117| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_117| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76))))))) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_24| 2147483648)) (<= |v_ULTIMATE.start_main_~ret~1#1_24| 2147483647) (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_25| |v_ULTIMATE.start_main_~ret~1#1_24|)) (not (= |v_ULTIMATE.start_main_~ret~1#1_24| |v_ULTIMATE.start_main_~ret5~0#1_26|))) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_26| 2147483648)) (<= |v_ULTIMATE.start_main_~ret2~0#1_25| 2147483647) (<= |v_ULTIMATE.start_main_~ret5~0#1_26| 2147483647))))' at error location [2024-11-09 05:49:12,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:49:12,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:49:12,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-09 05:49:12,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435312797] [2024-11-09 05:49:12,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:49:12,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 05:49:12,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:49:12,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 05:49:12,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1150, Unknown=29, NotChecked=0, Total=1482 [2024-11-09 05:49:12,345 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:49:12,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:49:12,436 INFO L93 Difference]: Finished difference Result 160 states and 177 transitions. [2024-11-09 05:49:12,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 05:49:12,436 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 149 [2024-11-09 05:49:12,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:49:12,438 INFO L225 Difference]: With dead ends: 160 [2024-11-09 05:49:12,438 INFO L226 Difference]: Without dead ends: 110 [2024-11-09 05:49:12,439 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 416 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 40.4s TimeCoverageRelationStatistics Valid=303, Invalid=1150, Unknown=29, NotChecked=0, Total=1482 [2024-11-09 05:49:12,440 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:49:12,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 97 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:49:12,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-09 05:49:12,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2024-11-09 05:49:12,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:49:12,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2024-11-09 05:49:12,453 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 149 [2024-11-09 05:49:12,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:49:12,453 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2024-11-09 05:49:12,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:49:12,454 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2024-11-09 05:49:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-11-09 05:49:12,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:49:12,461 INFO L215 NwaCegarLoop]: trace histogram [60, 60, 20, 20, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:49:12,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 05:49:12,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:49:12,665 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:49:12,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:49:12,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1970352805, now seen corresponding path program 8 times [2024-11-09 05:49:12,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:49:12,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491048647] [2024-11-09 05:49:12,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:49:12,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:49:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:49:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4168 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4132 trivial. 0 not checked. [2024-11-09 05:49:13,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:49:13,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491048647] [2024-11-09 05:49:13,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491048647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:49:13,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105431831] [2024-11-09 05:49:13,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:49:13,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:49:13,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:49:13,263 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:49:13,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:49:13,581 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-09 05:49:13,582 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:49:13,585 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:49:13,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:49:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4168 backedges. 1688 proven. 36 refuted. 0 times theorem prover too weak. 2444 trivial. 0 not checked. [2024-11-09 05:49:13,635 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:49:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4168 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4132 trivial. 0 not checked. [2024-11-09 05:49:13,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105431831] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:49:13,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1489654153] [2024-11-09 05:49:13,816 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:49:13,817 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:49:13,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:49:13,817 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:49:13,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:49:14,468 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-09 05:49:14,509 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:50:06,398 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6916#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret5~0#1_28| Int) (|v_ULTIMATE.start_main_~ret2~0#1_27| Int) (|v_ULTIMATE.start_main_~ret~1#1_25| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_28| 2147483648)) (<= |v_ULTIMATE.start_main_~ret5~0#1_28| 2147483647) (or (not (= |v_ULTIMATE.start_main_~ret~1#1_25| |v_ULTIMATE.start_main_~ret5~0#1_28|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_27| |v_ULTIMATE.start_main_~ret~1#1_25|))) (or (and (exists ((|v_#memory_int_131| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_131| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_131| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76))))) (exists ((v_max_~x.offset_BEFORE_RETURN_47 Int) (v_max_~x.base_BEFORE_RETURN_47 Int) (v_max_~ret~0_331 Int)) (and (or (= |v_ULTIMATE.start_main_~ret5~0#1_28| (mod v_max_~ret~0_331 4294967296)) (= (+ |v_ULTIMATE.start_main_~ret5~0#1_28| 4294967296) (mod v_max_~ret~0_331 4294967296))) (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_47) (+ 76 v_max_~x.offset_BEFORE_RETURN_47)) v_max_~ret~0_331)))) (and (exists ((|v_#memory_int_131| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_131| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_131| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76))))) (exists ((v_max_~x.offset_BEFORE_RETURN_48 Int) (v_max_~x.base_BEFORE_RETURN_48 Int) (v_max_~ret~0_331 Int)) (and (or (= |v_ULTIMATE.start_main_~ret5~0#1_28| (mod v_max_~ret~0_331 4294967296)) (= (+ |v_ULTIMATE.start_main_~ret5~0#1_28| 4294967296) (mod v_max_~ret~0_331 4294967296))) (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_48) (+ 76 v_max_~x.offset_BEFORE_RETURN_48)) v_max_~ret~0_331))))) (<= |v_ULTIMATE.start_main_~ret2~0#1_27| 2147483647) (<= |v_ULTIMATE.start_main_~ret~1#1_25| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_25| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_27| 2147483648)))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 05:50:06,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:50:06,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:50:06,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-09 05:50:06,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715133819] [2024-11-09 05:50:06,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:50:06,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 05:50:06,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:50:06,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 05:50:06,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=835, Unknown=34, NotChecked=0, Total=1056 [2024-11-09 05:50:06,401 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:50:06,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:50:06,494 INFO L93 Difference]: Finished difference Result 176 states and 188 transitions. [2024-11-09 05:50:06,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 05:50:06,495 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 197 [2024-11-09 05:50:06,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:50:06,497 INFO L225 Difference]: With dead ends: 176 [2024-11-09 05:50:06,497 INFO L226 Difference]: Without dead ends: 126 [2024-11-09 05:50:06,498 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 566 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 52.1s TimeCoverageRelationStatistics Valid=187, Invalid=835, Unknown=34, NotChecked=0, Total=1056 [2024-11-09 05:50:06,500 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:50:06,500 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 54 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:50:06,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-09 05:50:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-11-09 05:50:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:50:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2024-11-09 05:50:06,513 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 197 [2024-11-09 05:50:06,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:50:06,514 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2024-11-09 05:50:06,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:50:06,515 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2024-11-09 05:50:06,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2024-11-09 05:50:06,518 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:50:06,519 INFO L215 NwaCegarLoop]: trace histogram [60, 60, 20, 20, 14, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:50:06,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 05:50:06,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:50:06,720 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:50:06,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:50:06,720 INFO L85 PathProgramCache]: Analyzing trace with hash 215724749, now seen corresponding path program 9 times [2024-11-09 05:50:06,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:50:06,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432426157] [2024-11-09 05:50:06,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:50:06,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:50:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:50:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4328 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4132 trivial. 0 not checked. [2024-11-09 05:50:07,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:50:07,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432426157] [2024-11-09 05:50:07,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432426157] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:50:07,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591627882] [2024-11-09 05:50:07,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:50:07,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:50:07,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:50:07,822 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:50:07,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:50:08,189 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:50:08,189 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:50:08,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 05:50:08,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:50:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4328 backedges. 1688 proven. 196 refuted. 0 times theorem prover too weak. 2444 trivial. 0 not checked. [2024-11-09 05:50:08,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:50:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4328 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4132 trivial. 0 not checked. [2024-11-09 05:50:08,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591627882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:50:08,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [288054711] [2024-11-09 05:50:08,670 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:50:08,670 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:50:08,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:50:08,670 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:50:08,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:50:09,287 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-09 05:50:09,343 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:50:53,208 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8676#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~ret2~0#1_29| Int) (|v_ULTIMATE.start_main_~ret5~0#1_30| Int) (|v_ULTIMATE.start_main_~ret~1#1_26| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_26| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_29| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_29| |v_ULTIMATE.start_main_~ret~1#1_26|)) (not (= |v_ULTIMATE.start_main_~ret~1#1_26| |v_ULTIMATE.start_main_~ret5~0#1_30|))) (<= |v_ULTIMATE.start_main_~ret~1#1_26| 2147483647) (<= |v_ULTIMATE.start_main_~ret2~0#1_29| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_30| 2147483648)) (<= |v_ULTIMATE.start_main_~ret5~0#1_30| 2147483647) (or (and (exists ((v_max_~x.offset_BEFORE_RETURN_53 Int) (v_max_~ret~0_409 Int) (v_max_~x.base_BEFORE_RETURN_53 Int)) (and (or (= |v_ULTIMATE.start_main_~ret5~0#1_30| (mod v_max_~ret~0_409 4294967296)) (= (+ |v_ULTIMATE.start_main_~ret5~0#1_30| 4294967296) (mod v_max_~ret~0_409 4294967296))) (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_53) (+ 76 v_max_~x.offset_BEFORE_RETURN_53)) v_max_~ret~0_409))) (exists ((|v_#memory_int_153| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_153| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_153| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76)))))) (and (exists ((|v_#memory_int_153| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_153| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_153| |ULTIMATE.start_main_~#x~0#1.base|) 76 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 76))))) (exists ((v_max_~x.offset_BEFORE_RETURN_54 Int) (v_max_~ret~0_409 Int) (v_max_~x.base_BEFORE_RETURN_54 Int)) (and (or (= |v_ULTIMATE.start_main_~ret5~0#1_30| (mod v_max_~ret~0_409 4294967296)) (= (+ |v_ULTIMATE.start_main_~ret5~0#1_30| 4294967296) (mod v_max_~ret~0_409 4294967296))) (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_54) (+ 76 v_max_~x.offset_BEFORE_RETURN_54)) v_max_~ret~0_409))))))))' at error location [2024-11-09 05:50:53,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:50:53,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:50:53,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2024-11-09 05:50:53,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146524827] [2024-11-09 05:50:53,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:50:53,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 05:50:53,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:50:53,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 05:50:53,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1094, Unknown=30, NotChecked=0, Total=1406 [2024-11-09 05:50:53,211 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:50:53,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:50:53,309 INFO L93 Difference]: Finished difference Result 186 states and 195 transitions. [2024-11-09 05:50:53,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 05:50:53,310 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 213 [2024-11-09 05:50:53,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:50:53,311 INFO L225 Difference]: With dead ends: 186 [2024-11-09 05:50:53,311 INFO L226 Difference]: Without dead ends: 136 [2024-11-09 05:50:53,312 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 606 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=282, Invalid=1094, Unknown=30, NotChecked=0, Total=1406 [2024-11-09 05:50:53,313 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:50:53,313 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 88 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:50:53,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-09 05:50:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2024-11-09 05:50:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:50:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2024-11-09 05:50:53,330 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 213 [2024-11-09 05:50:53,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:50:53,331 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2024-11-09 05:50:53,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:50:53,331 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2024-11-09 05:50:53,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2024-11-09 05:50:53,334 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:50:53,334 INFO L215 NwaCegarLoop]: trace histogram [60, 60, 20, 20, 19, 19, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:50:53,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 05:50:53,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccb143f4-3040-4499-9119-e798a0d4525c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 05:50:53,535 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:50:53,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:50:53,535 INFO L85 PathProgramCache]: Analyzing trace with hash 8652870, now seen corresponding path program 10 times [2024-11-09 05:50:53,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:50:53,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540791442] [2024-11-09 05:50:53,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:50:53,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:53:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat