./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c --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_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/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_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/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_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/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 c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:35:57,502 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:35:57,582 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:35:57,587 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:35:57,587 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:35:57,612 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:35:57,613 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:35:57,613 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:35:57,614 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:35:57,615 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:35:57,615 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:35:57,615 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:35:57,616 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:35:57,616 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:35:57,617 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:35:57,617 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:35:57,618 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:35:57,618 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:35:57,619 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:35:57,619 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:35:57,620 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:35:57,621 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:35:57,622 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:35:57,622 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:35:57,622 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:35:57,623 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:35:57,623 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:35:57,624 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:35:57,624 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:35:57,624 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:35:57,625 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:35:57,625 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:35:57,625 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:35:57,626 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:35:57,626 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:35:57,626 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:35:57,627 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:35:57,627 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:35:57,627 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:35:57,628 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:35:57,628 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:35:57,629 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:35:57,629 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:35:57,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:35:57,630 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:35:57,630 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:35:57,631 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:35:57,631 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_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 [2024-11-09 05:35:57,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:35:57,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:35:57,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:35:57,994 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:35:57,994 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:35:57,997 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c Unable to find full path for "g++" [2024-11-09 05:36:00,144 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:36:00,339 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:36:00,340 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2024-11-09 05:36:00,347 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/data/1fe24a3d6/ba65a50c32114c57b2e0c78572102743/FLAG98aade1e5 [2024-11-09 05:36:00,722 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/data/1fe24a3d6/ba65a50c32114c57b2e0c78572102743 [2024-11-09 05:36:00,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:36:00,726 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:36:00,727 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:36:00,728 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:36:00,736 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:36:00,737 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:36:00" (1/1) ... [2024-11-09 05:36:00,738 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25a742fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:36:00, skipping insertion in model container [2024-11-09 05:36:00,738 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:36:00" (1/1) ... [2024-11-09 05:36:00,772 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:36:01,037 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_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c[414,427] [2024-11-09 05:36:01,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:36:01,079 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:36:01,096 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_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c[414,427] [2024-11-09 05:36:01,106 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:36:01,130 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:36:01,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:36:01 WrapperNode [2024-11-09 05:36:01,130 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:36:01,132 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:36:01,132 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:36:01,132 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:36:01,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:36:01" (1/1) ... [2024-11-09 05:36:01,149 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:36:01" (1/1) ... [2024-11-09 05:36:01,165 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2024-11-09 05:36:01,166 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:36:01,167 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:36:01,167 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:36:01,167 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:36:01,178 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:36:01" (1/1) ... [2024-11-09 05:36:01,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:36:01" (1/1) ... [2024-11-09 05:36:01,179 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:36:01" (1/1) ... [2024-11-09 05:36:01,180 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:36:01" (1/1) ... [2024-11-09 05:36:01,185 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:36:01" (1/1) ... [2024-11-09 05:36:01,188 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:36:01" (1/1) ... [2024-11-09 05:36:01,190 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:36:01" (1/1) ... [2024-11-09 05:36:01,191 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:36:01" (1/1) ... [2024-11-09 05:36:01,193 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:36:01,194 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:36:01,194 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:36:01,194 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:36:01,195 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:36:01" (1/1) ... [2024-11-09 05:36:01,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:36:01,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:01,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:36:01,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:36:01,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:36:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:36:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:36:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:36:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:36:01,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:36:01,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:36:01,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:36:01,351 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:36:01,353 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:36:01,510 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-09 05:36:01,511 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:36:01,555 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:36:01,558 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:36:01,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:36:01 BoogieIcfgContainer [2024-11-09 05:36:01,559 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:36:01,562 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:36:01,563 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:36:01,568 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:36:01,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:36:00" (1/3) ... [2024-11-09 05:36:01,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d0760a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:36:01, skipping insertion in model container [2024-11-09 05:36:01,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:36:01" (2/3) ... [2024-11-09 05:36:01,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d0760a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:36:01, skipping insertion in model container [2024-11-09 05:36:01,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:36:01" (3/3) ... [2024-11-09 05:36:01,574 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind.c [2024-11-09 05:36:01,596 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:36:01,596 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:36:01,666 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:36:01,675 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;@1215a494, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:36:01,675 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:36:01,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:01,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 05:36:01,688 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:01,689 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:36:01,690 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:01,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:01,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1927853080, now seen corresponding path program 1 times [2024-11-09 05:36:01,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:01,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956327252] [2024-11-09 05:36:01,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:01,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:02,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:02,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956327252] [2024-11-09 05:36:02,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956327252] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:36:02,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:36:02,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:36:02,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672839123] [2024-11-09 05:36:02,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:36:02,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:36:02,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:02,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:36:02,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:36:02,144 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:02,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:02,234 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2024-11-09 05:36:02,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:36:02,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 05:36:02,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:02,247 INFO L225 Difference]: With dead ends: 32 [2024-11-09 05:36:02,247 INFO L226 Difference]: Without dead ends: 21 [2024-11-09 05:36:02,250 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 05:36:02,255 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:02,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 14 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:36:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-09 05:36:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 13. [2024-11-09 05:36:02,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:02,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2024-11-09 05:36:02,303 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 7 [2024-11-09 05:36:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:02,304 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2024-11-09 05:36:02,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:02,305 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2024-11-09 05:36:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 05:36:02,306 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:02,306 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:36:02,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:36:02,307 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:02,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:02,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1890393375, now seen corresponding path program 1 times [2024-11-09 05:36:02,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:02,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655594062] [2024-11-09 05:36:02,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:02,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:02,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:02,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655594062] [2024-11-09 05:36:02,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655594062] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:36:02,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:36:02,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:36:02,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866377678] [2024-11-09 05:36:02,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:36:02,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:36:02,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:02,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:36:02,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:36:02,527 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:02,583 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2024-11-09 05:36:02,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:36:02,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 05:36:02,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:02,584 INFO L225 Difference]: With dead ends: 22 [2024-11-09 05:36:02,585 INFO L226 Difference]: Without dead ends: 14 [2024-11-09 05:36:02,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:36:02,587 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:02,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:36:02,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-09 05:36:02,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-09 05:36:02,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:02,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2024-11-09 05:36:02,595 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2024-11-09 05:36:02,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:02,598 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2024-11-09 05:36:02,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:02,599 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2024-11-09 05:36:02,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 05:36:02,601 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:02,602 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:36:02,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:36:02,602 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:02,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:02,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1053716667, now seen corresponding path program 1 times [2024-11-09 05:36:02,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:02,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126284098] [2024-11-09 05:36:02,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:02,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:02,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:02,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126284098] [2024-11-09 05:36:02,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126284098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:02,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747942806] [2024-11-09 05:36:02,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:02,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:02,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:02,765 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:02,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:36:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:02,859 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:36:02,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:02,980 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:03,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747942806] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:03,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1345188321] [2024-11-09 05:36:03,064 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:36:03,064 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:03,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:03,078 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:03,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:03,909 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:04,181 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '185#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= 100000 ~N~0))' at error location [2024-11-09 05:36:04,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:04,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:04,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-11-09 05:36:04,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086267191] [2024-11-09 05:36:04,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:04,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 05:36:04,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:04,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 05:36:04,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-11-09 05:36:04,185 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:04,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:04,280 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2024-11-09 05:36:04,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:36:04,280 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-09 05:36:04,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:04,281 INFO L225 Difference]: With dead ends: 44 [2024-11-09 05:36:04,281 INFO L226 Difference]: Without dead ends: 35 [2024-11-09 05:36:04,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:36:04,283 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:04,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 46 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:36:04,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-09 05:36:04,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2024-11-09 05:36:04,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-09 05:36:04,289 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 10 [2024-11-09 05:36:04,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:04,290 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-09 05:36:04,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:04,290 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-09 05:36:04,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 05:36:04,291 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:04,291 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:36:04,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:36:04,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-09 05:36:04,496 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:04,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:04,496 INFO L85 PathProgramCache]: Analyzing trace with hash -811352127, now seen corresponding path program 1 times [2024-11-09 05:36:04,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:04,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374947570] [2024-11-09 05:36:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:04,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:04,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:04,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374947570] [2024-11-09 05:36:04,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374947570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:04,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256608054] [2024-11-09 05:36:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:04,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:04,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:05,004 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:05,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:36:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:05,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 05:36:05,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:05,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:36:05,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:36:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:05,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:05,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:36:05,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:36:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:05,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256608054] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:05,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [55711440] [2024-11-09 05:36:05,481 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:36:05,481 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:05,482 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:05,482 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:05,482 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:05,878 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:06,397 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '374#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_25| Int)) (and (<= |v_ULTIMATE.start_main_~x~0#1_25| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~x~0#1_25| 2147483648)) (not (= |v_ULTIMATE.start_main_~x~0#1_25| 0)))) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= 100000 ~N~0))' at error location [2024-11-09 05:36:06,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:06,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:06,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-09 05:36:06,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146938821] [2024-11-09 05:36:06,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:06,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:36:06,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:06,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:36:06,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:36:06,402 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:06,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:06,537 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2024-11-09 05:36:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:36:06,538 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-09 05:36:06,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:06,539 INFO L225 Difference]: With dead ends: 34 [2024-11-09 05:36:06,539 INFO L226 Difference]: Without dead ends: 32 [2024-11-09 05:36:06,539 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-11-09 05:36:06,540 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:06,541 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 52 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:36:06,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-09 05:36:06,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2024-11-09 05:36:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-09 05:36:06,546 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2024-11-09 05:36:06,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:06,546 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-09 05:36:06,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:06,547 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-09 05:36:06,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-09 05:36:06,547 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:06,547 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:36:06,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:36:06,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:06,752 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:06,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:06,753 INFO L85 PathProgramCache]: Analyzing trace with hash -253157906, now seen corresponding path program 2 times [2024-11-09 05:36:06,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:06,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258564471] [2024-11-09 05:36:06,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:06,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:07,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:07,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258564471] [2024-11-09 05:36:07,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258564471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:07,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676834404] [2024-11-09 05:36:07,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:36:07,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:07,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:07,104 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:07,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:36:07,169 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 05:36:07,169 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:36:07,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 05:36:07,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:07,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:36:07,271 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:36:07,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:36:07,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:36:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:07,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:07,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2024-11-09 05:36:07,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2024-11-09 05:36:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:07,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676834404] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:07,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [344002056] [2024-11-09 05:36:07,488 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:36:07,489 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:07,489 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:07,489 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:07,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:07,821 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:08,249 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '573#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) 0) (exists ((|v_ULTIMATE.start_main_~x~0#1_34| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~x~0#1_34| 2147483648)) (not (= |v_ULTIMATE.start_main_~x~0#1_34| 0)) (<= |v_ULTIMATE.start_main_~x~0#1_34| 2147483647))) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= 100000 ~N~0))' at error location [2024-11-09 05:36:08,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:08,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:08,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-09 05:36:08,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866518331] [2024-11-09 05:36:08,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:08,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 05:36:08,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:08,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 05:36:08,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-09 05:36:08,252 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:08,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:08,382 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2024-11-09 05:36:08,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:36:08,383 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-09 05:36:08,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:08,384 INFO L225 Difference]: With dead ends: 31 [2024-11-09 05:36:08,384 INFO L226 Difference]: Without dead ends: 29 [2024-11-09 05:36:08,385 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-11-09 05:36:08,385 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:08,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 27 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:36:08,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-09 05:36:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2024-11-09 05:36:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-09 05:36:08,391 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2024-11-09 05:36:08,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:08,391 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-09 05:36:08,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:08,392 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-09 05:36:08,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 05:36:08,392 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:08,392 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:36:08,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:36:08,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:08,593 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:08,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:08,594 INFO L85 PathProgramCache]: Analyzing trace with hash -584711768, now seen corresponding path program 1 times [2024-11-09 05:36:08,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:08,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550395924] [2024-11-09 05:36:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:08,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:08,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:08,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550395924] [2024-11-09 05:36:08,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550395924] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:08,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295583685] [2024-11-09 05:36:08,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:08,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:08,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:08,679 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:08,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:36:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:08,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:36:08,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:08,806 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:08,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295583685] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:08,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1717103641] [2024-11-09 05:36:08,858 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:36:08,859 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:08,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:08,859 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:08,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:09,246 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:09,484 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '773#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:36:09,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:09,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:09,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-09 05:36:09,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134390359] [2024-11-09 05:36:09,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:09,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 05:36:09,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:09,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 05:36:09,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:36:09,488 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:09,549 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2024-11-09 05:36:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:36:09,550 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-09 05:36:09,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:09,551 INFO L225 Difference]: With dead ends: 36 [2024-11-09 05:36:09,551 INFO L226 Difference]: Without dead ends: 24 [2024-11-09 05:36:09,551 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:36:09,552 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:09,552 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:36:09,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-09 05:36:09,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-09 05:36:09,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-11-09 05:36:09,557 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2024-11-09 05:36:09,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:09,558 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-11-09 05:36:09,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:09,558 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-11-09 05:36:09,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 05:36:09,559 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:09,559 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:36:09,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 05:36:09,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 05:36:09,763 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:09,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:09,764 INFO L85 PathProgramCache]: Analyzing trace with hash 50757973, now seen corresponding path program 2 times [2024-11-09 05:36:09,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:09,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232744306] [2024-11-09 05:36:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:09,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:10,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:10,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232744306] [2024-11-09 05:36:10,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232744306] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:10,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366109093] [2024-11-09 05:36:10,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:36:10,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:10,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:10,103 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:10,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:36:10,165 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 05:36:10,165 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:36:10,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 05:36:10,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:10,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:36:10,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:36:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:10,461 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:10,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:36:10,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:36:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:10,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366109093] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:10,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2020869317] [2024-11-09 05:36:10,731 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:36:10,731 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:10,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:10,731 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:10,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:11,129 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:11,466 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1008#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:36:11,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:11,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:11,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-09 05:36:11,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582874295] [2024-11-09 05:36:11,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:11,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 05:36:11,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:11,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 05:36:11,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2024-11-09 05:36:11,469 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:11,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:11,945 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2024-11-09 05:36:11,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:36:11,946 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-09 05:36:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:11,947 INFO L225 Difference]: With dead ends: 47 [2024-11-09 05:36:11,949 INFO L226 Difference]: Without dead ends: 45 [2024-11-09 05:36:11,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=195, Invalid=1445, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 05:36:11,951 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:11,952 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 97 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:36:11,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-09 05:36:11,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2024-11-09 05:36:11,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:11,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2024-11-09 05:36:11,963 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 22 [2024-11-09 05:36:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:11,964 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2024-11-09 05:36:11,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:11,964 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2024-11-09 05:36:11,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 05:36:11,965 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:11,965 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:36:11,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:36:12,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:12,166 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:12,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:12,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1665264577, now seen corresponding path program 1 times [2024-11-09 05:36:12,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:12,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897274465] [2024-11-09 05:36:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:12,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:36:12,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:12,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897274465] [2024-11-09 05:36:12,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897274465] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:12,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575058910] [2024-11-09 05:36:12,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:12,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:12,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:12,287 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:12,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:36:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:12,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:36:12,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:36:12,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:36:12,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575058910] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:12,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [197733193] [2024-11-09 05:36:12,550 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:36:12,551 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:12,551 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:12,551 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:12,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:12,935 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:13,258 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1284#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:36:13,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:13,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:13,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-09 05:36:13,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559220020] [2024-11-09 05:36:13,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:13,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 05:36:13,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:13,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 05:36:13,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2024-11-09 05:36:13,260 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:13,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:13,394 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2024-11-09 05:36:13,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 05:36:13,395 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-09 05:36:13,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:13,396 INFO L225 Difference]: With dead ends: 130 [2024-11-09 05:36:13,396 INFO L226 Difference]: Without dead ends: 120 [2024-11-09 05:36:13,396 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2024-11-09 05:36:13,397 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 128 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:13,397 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 76 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:36:13,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-09 05:36:13,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 51. [2024-11-09 05:36:13,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2024-11-09 05:36:13,407 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 23 [2024-11-09 05:36:13,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:13,408 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2024-11-09 05:36:13,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:13,411 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2024-11-09 05:36:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 05:36:13,411 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:13,411 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:36:13,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 05:36:13,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:13,612 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:13,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:13,613 INFO L85 PathProgramCache]: Analyzing trace with hash -886028664, now seen corresponding path program 3 times [2024-11-09 05:36:13,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:13,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142420188] [2024-11-09 05:36:13,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:13,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:14,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:14,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142420188] [2024-11-09 05:36:14,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142420188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:14,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430586074] [2024-11-09 05:36:14,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:36:14,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:14,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:14,071 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:14,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:36:14,155 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:36:14,155 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:36:14,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 05:36:14,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:14,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:36:14,314 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:36:14,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:36:14,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:36:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:14,441 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:14,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:36:14,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-09 05:36:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:14,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430586074] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:14,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1863088082] [2024-11-09 05:36:14,792 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:36:14,792 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:14,792 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:14,792 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:14,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:15,134 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:15,447 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1687#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:36:15,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:15,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:15,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-09 05:36:15,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751727686] [2024-11-09 05:36:15,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:15,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 05:36:15,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:15,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 05:36:15,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2024-11-09 05:36:15,450 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:15,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:15,776 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2024-11-09 05:36:15,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:36:15,777 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-09 05:36:15,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:15,779 INFO L225 Difference]: With dead ends: 61 [2024-11-09 05:36:15,779 INFO L226 Difference]: Without dead ends: 59 [2024-11-09 05:36:15,780 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 05:36:15,781 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:15,782 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 39 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:36:15,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-09 05:36:15,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2024-11-09 05:36:15,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2024-11-09 05:36:15,795 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 25 [2024-11-09 05:36:15,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:15,796 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2024-11-09 05:36:15,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:15,796 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2024-11-09 05:36:15,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 05:36:15,797 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:15,798 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2024-11-09 05:36:15,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:36:16,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 05:36:16,002 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:16,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:16,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1644966673, now seen corresponding path program 4 times [2024-11-09 05:36:16,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:16,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885285933] [2024-11-09 05:36:16,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:16,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:16,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:16,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885285933] [2024-11-09 05:36:16,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885285933] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:16,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342166886] [2024-11-09 05:36:16,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:36:16,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:16,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:16,622 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:16,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:36:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:16,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 05:36:16,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:16,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:36:17,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:36:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:17,023 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:17,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:36:17,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:36:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:17,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342166886] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:17,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1349994554] [2024-11-09 05:36:17,336 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:36:17,336 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:17,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:17,337 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:17,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:17,655 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:18,047 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2039#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:36:18,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:18,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:18,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2024-11-09 05:36:18,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875778903] [2024-11-09 05:36:18,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:18,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 05:36:18,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:18,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 05:36:18,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2024-11-09 05:36:18,050 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:18,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:18,451 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2024-11-09 05:36:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 05:36:18,451 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-09 05:36:18,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:18,452 INFO L225 Difference]: With dead ends: 80 [2024-11-09 05:36:18,452 INFO L226 Difference]: Without dead ends: 64 [2024-11-09 05:36:18,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 05:36:18,454 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:18,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 154 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:36:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-09 05:36:18,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2024-11-09 05:36:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:18,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-11-09 05:36:18,462 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 29 [2024-11-09 05:36:18,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:18,463 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-11-09 05:36:18,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:18,463 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-11-09 05:36:18,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 05:36:18,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:18,464 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2024-11-09 05:36:18,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 05:36:18,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 05:36:18,665 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:18,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:18,665 INFO L85 PathProgramCache]: Analyzing trace with hash -84351581, now seen corresponding path program 5 times [2024-11-09 05:36:18,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:18,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099355297] [2024-11-09 05:36:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:18,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:18,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:18,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099355297] [2024-11-09 05:36:18,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099355297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:18,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557575958] [2024-11-09 05:36:18,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:36:18,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:18,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:18,832 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:18,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:36:18,935 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 05:36:18,935 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:36:18,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:36:18,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:19,081 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:19,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557575958] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:19,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1651792685] [2024-11-09 05:36:19,188 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:36:19,189 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:19,190 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:19,190 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:19,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:19,511 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:19,837 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2414#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:36:19,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:19,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:19,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-09 05:36:19,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680099218] [2024-11-09 05:36:19,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:19,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 05:36:19,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:19,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 05:36:19,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2024-11-09 05:36:19,840 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:19,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:19,925 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2024-11-09 05:36:19,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 05:36:19,926 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-09 05:36:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:19,927 INFO L225 Difference]: With dead ends: 64 [2024-11-09 05:36:19,927 INFO L226 Difference]: Without dead ends: 46 [2024-11-09 05:36:19,928 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 66 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2024-11-09 05:36:19,929 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:19,929 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:36:19,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-09 05:36:19,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-09 05:36:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:19,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2024-11-09 05:36:19,938 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 30 [2024-11-09 05:36:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:19,938 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2024-11-09 05:36:19,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2024-11-09 05:36:19,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 05:36:19,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:19,940 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2024-11-09 05:36:19,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 05:36:20,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:20,144 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:20,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:20,145 INFO L85 PathProgramCache]: Analyzing trace with hash -15837092, now seen corresponding path program 6 times [2024-11-09 05:36:20,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:20,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136680693] [2024-11-09 05:36:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:20,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:20,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:20,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136680693] [2024-11-09 05:36:20,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136680693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:20,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765090849] [2024-11-09 05:36:20,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:36:20,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:20,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:20,717 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:20,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:36:20,818 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:36:20,819 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:36:20,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 05:36:20,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:20,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:36:21,020 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:36:21,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:36:21,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:36:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:21,188 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:21,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:36:21,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-09 05:36:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:21,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765090849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:21,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2035765247] [2024-11-09 05:36:21,660 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:36:21,660 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:21,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:21,661 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:21,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:21,989 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:22,388 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2780#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:36:22,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:22,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:22,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-11-09 05:36:22,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763777892] [2024-11-09 05:36:22,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:22,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 05:36:22,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:22,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 05:36:22,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 05:36:22,390 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 30 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:22,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:22,910 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2024-11-09 05:36:22,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:36:22,910 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 30 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-09 05:36:22,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:22,911 INFO L225 Difference]: With dead ends: 53 [2024-11-09 05:36:22,911 INFO L226 Difference]: Without dead ends: 51 [2024-11-09 05:36:22,912 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 05:36:22,913 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 67 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:22,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 80 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:36:22,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-09 05:36:22,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2024-11-09 05:36:22,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2024-11-09 05:36:22,924 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 32 [2024-11-09 05:36:22,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:22,925 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2024-11-09 05:36:22,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 30 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:22,926 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2024-11-09 05:36:22,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 05:36:22,927 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:22,927 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2024-11-09 05:36:22,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 05:36:23,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 05:36:23,128 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:23,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:23,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1374890813, now seen corresponding path program 7 times [2024-11-09 05:36:23,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:23,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980822984] [2024-11-09 05:36:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:23,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:23,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:23,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980822984] [2024-11-09 05:36:23,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980822984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:23,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965157705] [2024-11-09 05:36:23,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:36:23,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:23,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:23,602 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:23,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:36:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:23,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 05:36:23,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:23,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:36:24,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:36:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:24,220 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:24,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:36:24,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:36:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:24,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965157705] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:24,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1945985278] [2024-11-09 05:36:24,672 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:36:24,672 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:24,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:24,678 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:24,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:25,132 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:25,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3174#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:36:25,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:25,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:25,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-09 05:36:25,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996585734] [2024-11-09 05:36:25,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:25,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 05:36:25,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:25,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 05:36:25,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 05:36:25,709 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 33 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:26,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:26,185 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2024-11-09 05:36:26,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:36:26,186 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 33 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-09 05:36:26,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:26,187 INFO L225 Difference]: With dead ends: 75 [2024-11-09 05:36:26,187 INFO L226 Difference]: Without dead ends: 73 [2024-11-09 05:36:26,188 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=146, Invalid=1660, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 05:36:26,188 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:26,189 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 184 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:36:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-09 05:36:26,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2024-11-09 05:36:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:26,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2024-11-09 05:36:26,207 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 36 [2024-11-09 05:36:26,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:26,209 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2024-11-09 05:36:26,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 33 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:26,209 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2024-11-09 05:36:26,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 05:36:26,212 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:26,212 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2024-11-09 05:36:26,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 05:36:26,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 05:36:26,417 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:26,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:26,420 INFO L85 PathProgramCache]: Analyzing trace with hash 972031158, now seen corresponding path program 8 times [2024-11-09 05:36:26,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:26,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163784994] [2024-11-09 05:36:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:26,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:27,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:27,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163784994] [2024-11-09 05:36:27,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163784994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:27,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944400215] [2024-11-09 05:36:27,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:36:27,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:27,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:27,023 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:27,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 05:36:27,162 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 05:36:27,162 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:36:27,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 05:36:27,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:27,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:36:27,315 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:36:27,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:36:27,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:36:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:27,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:27,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:36:27,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-09 05:36:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:27,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944400215] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:27,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1263193249] [2024-11-09 05:36:27,910 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:36:27,910 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:27,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:27,911 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:27,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:28,165 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:28,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3610#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:36:28,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:28,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:28,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2024-11-09 05:36:28,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603703583] [2024-11-09 05:36:28,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:28,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 05:36:28,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:28,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 05:36:28,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1290, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 05:36:28,610 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:29,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:29,090 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2024-11-09 05:36:29,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:36:29,090 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-09 05:36:29,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:29,091 INFO L225 Difference]: With dead ends: 73 [2024-11-09 05:36:29,091 INFO L226 Difference]: Without dead ends: 71 [2024-11-09 05:36:29,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=168, Invalid=1638, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 05:36:29,093 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 64 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:29,093 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 104 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:36:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-09 05:36:29,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 54. [2024-11-09 05:36:29,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:29,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2024-11-09 05:36:29,108 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 39 [2024-11-09 05:36:29,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:29,109 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2024-11-09 05:36:29,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:29,109 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2024-11-09 05:36:29,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 05:36:29,110 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:29,110 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 05:36:29,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 05:36:29,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 05:36:29,314 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:29,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:29,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2028419670, now seen corresponding path program 9 times [2024-11-09 05:36:29,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:29,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665521604] [2024-11-09 05:36:29,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:29,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:29,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:29,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665521604] [2024-11-09 05:36:29,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665521604] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:29,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540007954] [2024-11-09 05:36:29,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:36:29,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:29,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:29,551 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:29,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 05:36:29,692 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:36:29,692 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:36:29,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:36:29,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:29,890 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:30,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540007954] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:30,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [734717054] [2024-11-09 05:36:30,007 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:36:30,007 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:30,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:30,008 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:30,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:30,252 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:30,561 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4044#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:36:30,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:30,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:30,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2024-11-09 05:36:30,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543522327] [2024-11-09 05:36:30,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:30,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 05:36:30,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:30,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 05:36:30,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2024-11-09 05:36:30,564 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:30,693 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2024-11-09 05:36:30,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:36:30,694 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-09 05:36:30,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:30,694 INFO L225 Difference]: With dead ends: 78 [2024-11-09 05:36:30,695 INFO L226 Difference]: Without dead ends: 54 [2024-11-09 05:36:30,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 91 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2024-11-09 05:36:30,696 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:30,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:36:30,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-09 05:36:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-09 05:36:30,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:30,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2024-11-09 05:36:30,707 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 40 [2024-11-09 05:36:30,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:30,707 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2024-11-09 05:36:30,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:30,708 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2024-11-09 05:36:30,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 05:36:30,709 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:30,709 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 05:36:30,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 05:36:30,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 05:36:30,910 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:30,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:30,910 INFO L85 PathProgramCache]: Analyzing trace with hash 221037597, now seen corresponding path program 10 times [2024-11-09 05:36:30,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:30,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938610078] [2024-11-09 05:36:30,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:30,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:31,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:31,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938610078] [2024-11-09 05:36:31,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938610078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:31,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069228197] [2024-11-09 05:36:31,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:36:31,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:31,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:31,696 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:31,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 05:36:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:31,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 05:36:31,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:32,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:36:32,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:36:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:32,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:32,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:36:32,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:36:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:33,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069228197] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:33,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97525619] [2024-11-09 05:36:33,029 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:36:33,029 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:33,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:33,038 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:33,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:33,334 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:33,994 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4514#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:36:33,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:33,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:33,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-11-09 05:36:33,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260300411] [2024-11-09 05:36:33,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:33,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 05:36:33,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:33,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 05:36:33,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2100, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 05:36:33,997 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 41 states, 41 states have (on average 3.073170731707317) internal successors, (126), 40 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:34,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:34,942 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2024-11-09 05:36:34,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 05:36:34,942 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.073170731707317) internal successors, (126), 40 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-09 05:36:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:34,943 INFO L225 Difference]: With dead ends: 81 [2024-11-09 05:36:34,943 INFO L226 Difference]: Without dead ends: 54 [2024-11-09 05:36:34,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 90 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=279, Invalid=3143, Unknown=0, NotChecked=0, Total=3422 [2024-11-09 05:36:34,945 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:34,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 205 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:36:34,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-09 05:36:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-09 05:36:34,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:34,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2024-11-09 05:36:34,956 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 43 [2024-11-09 05:36:34,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:34,956 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2024-11-09 05:36:34,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.073170731707317) internal successors, (126), 40 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:34,956 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2024-11-09 05:36:34,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 05:36:34,957 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:34,957 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 05:36:34,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 05:36:35,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:35,161 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:35,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:35,162 INFO L85 PathProgramCache]: Analyzing trace with hash -572240694, now seen corresponding path program 11 times [2024-11-09 05:36:35,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:35,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790214215] [2024-11-09 05:36:35,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:35,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:35,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:35,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790214215] [2024-11-09 05:36:35,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790214215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:35,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180208405] [2024-11-09 05:36:35,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:36:35,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:35,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:35,879 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:35,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 05:36:36,068 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-09 05:36:36,068 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:36:36,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 05:36:36,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:36,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:36:36,249 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:36:36,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:36:36,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:36:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:36,511 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:36,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:36:36,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-09 05:36:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:37,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180208405] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:37,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1986619556] [2024-11-09 05:36:37,174 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:36:37,174 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:37,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:37,175 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:37,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:37,411 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:37,870 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5022#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:36:37,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:37,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:37,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2024-11-09 05:36:37,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317496530] [2024-11-09 05:36:37,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:37,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 05:36:37,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:37,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 05:36:37,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1674, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 05:36:37,872 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 36 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 35 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:38,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:38,468 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2024-11-09 05:36:38,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 05:36:38,468 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 35 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-09 05:36:38,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:38,469 INFO L225 Difference]: With dead ends: 61 [2024-11-09 05:36:38,469 INFO L226 Difference]: Without dead ends: 59 [2024-11-09 05:36:38,470 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=194, Invalid=2158, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 05:36:38,470 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:38,471 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 127 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:36:38,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-09 05:36:38,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-11-09 05:36:38,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2024-11-09 05:36:38,483 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 46 [2024-11-09 05:36:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:38,484 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2024-11-09 05:36:38,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 35 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:38,484 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2024-11-09 05:36:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 05:36:38,485 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:38,485 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2024-11-09 05:36:38,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 05:36:38,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:38,689 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:38,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:38,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1898520015, now seen corresponding path program 12 times [2024-11-09 05:36:38,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:38,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518936008] [2024-11-09 05:36:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:38,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:39,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:39,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518936008] [2024-11-09 05:36:39,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518936008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:39,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582589336] [2024-11-09 05:36:39,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:36:39,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:39,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:39,448 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:39,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 05:36:39,637 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:36:39,638 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:36:39,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 05:36:39,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:39,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-09 05:36:40,522 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 05:36:40,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-11-09 05:36:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 45 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:40,569 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:41,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-09 05:36:41,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2024-11-09 05:36:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 40 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:41,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582589336] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:41,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [651281976] [2024-11-09 05:36:41,911 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:36:41,911 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:41,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:41,912 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:41,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:42,127 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:42,663 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5531#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:36:42,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:42,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:42,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 42 [2024-11-09 05:36:42,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382371692] [2024-11-09 05:36:42,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:42,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 05:36:42,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:42,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 05:36:42,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2202, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 05:36:42,671 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 42 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:43,712 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2024-11-09 05:36:43,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 05:36:43,713 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 42 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-09 05:36:43,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:43,713 INFO L225 Difference]: With dead ends: 86 [2024-11-09 05:36:43,713 INFO L226 Difference]: Without dead ends: 58 [2024-11-09 05:36:43,715 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=406, Invalid=3134, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 05:36:43,715 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:43,716 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 140 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:36:43,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-09 05:36:43,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-09 05:36:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:43,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2024-11-09 05:36:43,727 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 50 [2024-11-09 05:36:43,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:43,727 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2024-11-09 05:36:43,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 42 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:43,728 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2024-11-09 05:36:43,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 05:36:43,728 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:43,729 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2024-11-09 05:36:43,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 05:36:43,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 05:36:43,929 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:43,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:43,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1522422556, now seen corresponding path program 13 times [2024-11-09 05:36:43,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:43,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420137546] [2024-11-09 05:36:43,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:43,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:44,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:44,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420137546] [2024-11-09 05:36:44,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420137546] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:44,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433826165] [2024-11-09 05:36:44,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:36:44,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:44,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:44,755 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:44,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 05:36:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:44,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 05:36:44,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:45,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:36:45,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:36:45,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-09 05:36:45,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:36:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:45,756 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:46,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:36:46,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2024-11-09 05:36:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:46,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433826165] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:46,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [70317842] [2024-11-09 05:36:46,494 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:36:46,494 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:46,495 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:46,495 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:46,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:46,707 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:47,253 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6104#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:36:47,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:47,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:47,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2024-11-09 05:36:47,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540764224] [2024-11-09 05:36:47,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:47,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-09 05:36:47,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:47,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-09 05:36:47,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2892, Unknown=0, NotChecked=0, Total=3080 [2024-11-09 05:36:47,256 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 48 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:48,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:48,256 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2024-11-09 05:36:48,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 05:36:48,257 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 48 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-09 05:36:48,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:48,257 INFO L225 Difference]: With dead ends: 65 [2024-11-09 05:36:48,257 INFO L226 Difference]: Without dead ends: 63 [2024-11-09 05:36:48,259 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=273, Invalid=3759, Unknown=0, NotChecked=0, Total=4032 [2024-11-09 05:36:48,259 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 80 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:48,260 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 240 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:36:48,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-09 05:36:48,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-11-09 05:36:48,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:48,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2024-11-09 05:36:48,279 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 53 [2024-11-09 05:36:48,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:48,280 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2024-11-09 05:36:48,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 48 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:48,280 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2024-11-09 05:36:48,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-09 05:36:48,280 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:48,280 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2024-11-09 05:36:48,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 05:36:48,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:48,481 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:48,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:48,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1443715765, now seen corresponding path program 14 times [2024-11-09 05:36:48,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:48,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156046452] [2024-11-09 05:36:48,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:48,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:49,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:49,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156046452] [2024-11-09 05:36:49,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156046452] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:49,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271104914] [2024-11-09 05:36:49,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:36:49,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:49,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:49,215 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:49,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 05:36:49,404 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-09 05:36:49,404 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:36:49,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 05:36:49,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:49,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-09 05:36:50,328 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 05:36:50,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-11-09 05:36:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 66 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:50,359 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:51,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-09 05:36:51,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2024-11-09 05:36:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 60 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:51,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271104914] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:51,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [311992616] [2024-11-09 05:36:51,747 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:36:51,747 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:51,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:51,748 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:51,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:51,949 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:52,867 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6674#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:36:52,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:52,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:52,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 47 [2024-11-09 05:36:52,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618468551] [2024-11-09 05:36:52,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:52,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-09 05:36:52,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:52,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-09 05:36:52,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=2674, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 05:36:52,870 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 48 states, 48 states have (on average 3.1458333333333335) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:54,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:54,246 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2024-11-09 05:36:54,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 05:36:54,247 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.1458333333333335) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-09 05:36:54,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:54,248 INFO L225 Difference]: With dead ends: 94 [2024-11-09 05:36:54,248 INFO L226 Difference]: Without dead ends: 62 [2024-11-09 05:36:54,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 126 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=481, Invalid=3809, Unknown=0, NotChecked=0, Total=4290 [2024-11-09 05:36:54,250 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:54,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 155 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 05:36:54,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-09 05:36:54,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-09 05:36:54,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:54,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2024-11-09 05:36:54,259 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 57 [2024-11-09 05:36:54,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:54,259 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2024-11-09 05:36:54,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.1458333333333335) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:54,260 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2024-11-09 05:36:54,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 05:36:54,260 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:54,260 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2024-11-09 05:36:54,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 05:36:54,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:54,461 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:54,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:54,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1205667016, now seen corresponding path program 15 times [2024-11-09 05:36:54,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:54,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370424382] [2024-11-09 05:36:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:54,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:36:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:55,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:36:55,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370424382] [2024-11-09 05:36:55,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370424382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:36:55,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771080847] [2024-11-09 05:36:55,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:36:55,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:36:55,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:36:55,327 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:36:55,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 05:36:55,574 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:36:55,574 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:36:55,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 05:36:55,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:36:55,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:36:55,766 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:36:55,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:36:56,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:36:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:56,177 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:36:56,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:36:56,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2024-11-09 05:36:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:36:57,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771080847] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:36:57,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [72111644] [2024-11-09 05:36:57,090 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:36:57,090 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:36:57,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:36:57,091 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:36:57,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:36:57,304 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:36:58,171 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7303#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:36:58,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:36:58,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:36:58,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2024-11-09 05:36:58,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382632813] [2024-11-09 05:36:58,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:36:58,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-09 05:36:58,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:36:58,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-09 05:36:58,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2592, Unknown=0, NotChecked=0, Total=2756 [2024-11-09 05:36:58,174 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:59,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:36:59,252 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2024-11-09 05:36:59,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 05:36:59,253 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2024-11-09 05:36:59,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:36:59,254 INFO L225 Difference]: With dead ends: 69 [2024-11-09 05:36:59,254 INFO L226 Difference]: Without dead ends: 67 [2024-11-09 05:36:59,255 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 138 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=246, Invalid=3414, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 05:36:59,256 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:36:59,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 261 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 05:36:59,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-09 05:36:59,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-11-09 05:36:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:59,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2024-11-09 05:36:59,269 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 60 [2024-11-09 05:36:59,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:36:59,270 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2024-11-09 05:36:59,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:36:59,270 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2024-11-09 05:36:59,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-09 05:36:59,271 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:36:59,271 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2024-11-09 05:36:59,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-09 05:36:59,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 05:36:59,475 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:36:59,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:36:59,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1273189985, now seen corresponding path program 16 times [2024-11-09 05:36:59,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:36:59,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954849230] [2024-11-09 05:36:59,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:36:59,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:36:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:37:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:00,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:37:00,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954849230] [2024-11-09 05:37:00,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954849230] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:37:00,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337789703] [2024-11-09 05:37:00,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:37:00,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:37:00,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:37:00,382 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:37:00,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 05:37:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:37:00,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-09 05:37:00,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:37:00,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:37:01,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:37:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:01,485 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:37:01,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:37:01,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:37:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:02,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337789703] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:37:02,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1699021046] [2024-11-09 05:37:02,462 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:37:02,462 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:37:02,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:37:02,463 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:37:02,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:37:02,761 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:37:03,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7935#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:37:03,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:37:03,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:37:03,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 57 [2024-11-09 05:37:03,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159478091] [2024-11-09 05:37:03,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:37:03,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-09 05:37:03,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:37:03,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-09 05:37:03,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=3945, Unknown=0, NotChecked=0, Total=4160 [2024-11-09 05:37:03,399 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 57 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:04,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:37:04,575 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2024-11-09 05:37:04,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 05:37:04,576 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 57 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2024-11-09 05:37:04,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:37:04,577 INFO L225 Difference]: With dead ends: 109 [2024-11-09 05:37:04,577 INFO L226 Difference]: Without dead ends: 107 [2024-11-09 05:37:04,578 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=230, Invalid=4192, Unknown=0, NotChecked=0, Total=4422 [2024-11-09 05:37:04,579 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 2089 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:37:04,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 541 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2089 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 05:37:04,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-09 05:37:04,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 73. [2024-11-09 05:37:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2024-11-09 05:37:04,595 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 64 [2024-11-09 05:37:04,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:37:04,596 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2024-11-09 05:37:04,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 57 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2024-11-09 05:37:04,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-09 05:37:04,596 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:37:04,597 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2024-11-09 05:37:04,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 05:37:04,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 05:37:04,797 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:37:04,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:37:04,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2041987017, now seen corresponding path program 2 times [2024-11-09 05:37:04,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:37:04,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039845851] [2024-11-09 05:37:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:37:04,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:37:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:37:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-09 05:37:05,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:37:05,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039845851] [2024-11-09 05:37:05,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039845851] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:37:05,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291604951] [2024-11-09 05:37:05,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:37:05,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:37:05,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:37:05,067 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:37:05,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 05:37:05,291 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-09 05:37:05,291 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:37:05,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 05:37:05,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:37:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-09 05:37:05,524 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:37:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-09 05:37:05,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291604951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:37:05,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [787566845] [2024-11-09 05:37:05,806 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:37:05,806 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:37:05,807 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:37:05,807 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:37:05,807 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:37:06,009 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:37:06,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8595#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:37:06,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:37:06,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:37:06,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2024-11-09 05:37:06,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707889252] [2024-11-09 05:37:06,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:37:06,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 05:37:06,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:37:06,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 05:37:06,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=1146, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 05:37:06,609 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:06,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:37:06,927 INFO L93 Difference]: Finished difference Result 582 states and 608 transitions. [2024-11-09 05:37:06,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 05:37:06,928 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2024-11-09 05:37:06,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:37:06,931 INFO L225 Difference]: With dead ends: 582 [2024-11-09 05:37:06,932 INFO L226 Difference]: Without dead ends: 548 [2024-11-09 05:37:06,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 150 SyntacticMatches, 15 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1701 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=576, Invalid=1146, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 05:37:06,933 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 172 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:37:06,933 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 142 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:37:06,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2024-11-09 05:37:06,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 107. [2024-11-09 05:37:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 106 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:06,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2024-11-09 05:37:06,956 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 65 [2024-11-09 05:37:06,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:37:06,956 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2024-11-09 05:37:06,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:06,957 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2024-11-09 05:37:06,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-09 05:37:06,957 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:37:06,957 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2024-11-09 05:37:06,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-09 05:37:07,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:37:07,158 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:37:07,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:37:07,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1061764882, now seen corresponding path program 17 times [2024-11-09 05:37:07,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:37:07,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313593960] [2024-11-09 05:37:07,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:37:07,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:37:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:37:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:08,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:37:08,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313593960] [2024-11-09 05:37:08,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313593960] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:37:08,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212600714] [2024-11-09 05:37:08,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:37:08,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:37:08,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:37:08,195 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:37:08,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 05:37:08,683 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-09 05:37:08,684 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:37:08,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-09 05:37:08,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:37:08,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:37:08,910 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:37:08,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:37:09,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:37:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:09,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:37:09,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:37:09,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-09 05:37:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:10,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212600714] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:37:10,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [218336819] [2024-11-09 05:37:10,370 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:37:10,370 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:37:10,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:37:10,370 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:37:10,371 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:37:10,627 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:37:11,708 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9914#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:37:11,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:37:11,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:37:11,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 50 [2024-11-09 05:37:11,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780885632] [2024-11-09 05:37:11,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:37:11,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-09 05:37:11,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:37:11,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-09 05:37:11,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3126, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 05:37:11,711 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand has 51 states, 51 states have (on average 3.2941176470588234) internal successors, (168), 50 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:13,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:37:13,123 INFO L93 Difference]: Finished difference Result 141 states and 155 transitions. [2024-11-09 05:37:13,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 05:37:13,124 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.2941176470588234) internal successors, (168), 50 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-11-09 05:37:13,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:37:13,125 INFO L225 Difference]: With dead ends: 141 [2024-11-09 05:37:13,125 INFO L226 Difference]: Without dead ends: 139 [2024-11-09 05:37:13,126 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 155 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=272, Invalid=4150, Unknown=0, NotChecked=0, Total=4422 [2024-11-09 05:37:13,126 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:37:13,127 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 308 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 05:37:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-11-09 05:37:13,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 106. [2024-11-09 05:37:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 105 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:13,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 120 transitions. [2024-11-09 05:37:13,148 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 120 transitions. Word has length 67 [2024-11-09 05:37:13,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:37:13,148 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 120 transitions. [2024-11-09 05:37:13,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.2941176470588234) internal successors, (168), 50 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:13,148 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 120 transitions. [2024-11-09 05:37:13,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-09 05:37:13,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:37:13,149 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2024-11-09 05:37:13,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-09 05:37:13,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:37:13,350 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:37:13,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:37:13,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1522873210, now seen corresponding path program 18 times [2024-11-09 05:37:13,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:37:13,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563720906] [2024-11-09 05:37:13,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:37:13,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:37:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:37:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 107 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:13,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:37:13,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563720906] [2024-11-09 05:37:13,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563720906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:37:13,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378721077] [2024-11-09 05:37:13,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:37:13,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:37:13,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:37:13,835 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:37:13,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 05:37:14,327 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:37:14,327 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:37:14,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 05:37:14,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:37:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 136 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:14,671 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:37:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 136 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:14,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378721077] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:37:14,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [263970645] [2024-11-09 05:37:14,935 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:37:14,935 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:37:14,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:37:14,936 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:37:14,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:37:15,235 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:37:15,628 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10692#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:37:15,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:37:15,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:37:15,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2024-11-09 05:37:15,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363259584] [2024-11-09 05:37:15,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:37:15,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 05:37:15,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:37:15,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 05:37:15,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1215, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 05:37:15,630 INFO L87 Difference]: Start difference. First operand 106 states and 120 transitions. Second operand has 32 states, 32 states have (on average 3.46875) internal successors, (111), 31 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:37:15,842 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2024-11-09 05:37:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 05:37:15,842 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 31 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2024-11-09 05:37:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:37:15,844 INFO L225 Difference]: With dead ends: 146 [2024-11-09 05:37:15,844 INFO L226 Difference]: Without dead ends: 106 [2024-11-09 05:37:15,844 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 167 SyntacticMatches, 18 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=267, Invalid=1215, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 05:37:15,845 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:37:15,845 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 102 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:37:15,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-09 05:37:15,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-11-09 05:37:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1333333333333333) internal successors, (119), 105 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2024-11-09 05:37:15,866 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 68 [2024-11-09 05:37:15,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:37:15,866 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2024-11-09 05:37:15,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 31 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:15,866 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2024-11-09 05:37:15,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-09 05:37:15,867 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:37:15,867 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2024-11-09 05:37:15,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-09 05:37:16,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:37:16,068 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:37:16,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:37:16,068 INFO L85 PathProgramCache]: Analyzing trace with hash -194416519, now seen corresponding path program 19 times [2024-11-09 05:37:16,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:37:16,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295247316] [2024-11-09 05:37:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:37:16,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:37:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:37:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:17,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:37:17,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295247316] [2024-11-09 05:37:17,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295247316] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:37:17,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728653275] [2024-11-09 05:37:17,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:37:17,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:37:17,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:37:17,213 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:37:17,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 05:37:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:37:17,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-09 05:37:17,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:37:17,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:37:18,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:37:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:18,542 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:37:19,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:37:19,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:37:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:19,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728653275] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:37:19,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [472897606] [2024-11-09 05:37:19,811 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:37:19,812 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:37:19,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:37:19,812 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:37:19,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:37:20,073 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:37:20,890 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11509#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:37:20,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:37:20,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:37:20,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 63 [2024-11-09 05:37:20,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052606859] [2024-11-09 05:37:20,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:37:20,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-09 05:37:20,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:37:20,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-09 05:37:20,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=4734, Unknown=0, NotChecked=0, Total=4970 [2024-11-09 05:37:20,895 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 64 states, 64 states have (on average 3.28125) internal successors, (210), 63 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:22,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:37:22,272 INFO L93 Difference]: Finished difference Result 151 states and 164 transitions. [2024-11-09 05:37:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 05:37:22,273 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.28125) internal successors, (210), 63 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-11-09 05:37:22,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:37:22,274 INFO L225 Difference]: With dead ends: 151 [2024-11-09 05:37:22,274 INFO L226 Difference]: Without dead ends: 149 [2024-11-09 05:37:22,275 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=251, Invalid=5005, Unknown=0, NotChecked=0, Total=5256 [2024-11-09 05:37:22,275 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:37:22,276 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 524 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 05:37:22,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-09 05:37:22,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 111. [2024-11-09 05:37:22,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1272727272727272) internal successors, (124), 110 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:22,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2024-11-09 05:37:22,305 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 71 [2024-11-09 05:37:22,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:37:22,305 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2024-11-09 05:37:22,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.28125) internal successors, (210), 63 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:22,305 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2024-11-09 05:37:22,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-09 05:37:22,306 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:37:22,306 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2024-11-09 05:37:22,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-09 05:37:22,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:37:22,507 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:37:22,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:37:22,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2030199718, now seen corresponding path program 20 times [2024-11-09 05:37:22,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:37:22,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236749908] [2024-11-09 05:37:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:37:22,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:37:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:37:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:23,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:37:23,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236749908] [2024-11-09 05:37:23,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236749908] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:37:23,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971489313] [2024-11-09 05:37:23,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:37:23,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:37:23,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:37:23,992 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:37:23,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 05:37:24,444 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-09 05:37:24,444 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:37:24,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-09 05:37:24,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:37:24,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:37:25,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:37:25,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-09 05:37:25,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:37:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:25,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:37:26,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:37:26,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-09 05:37:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:27,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971489313] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:37:27,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [442292479] [2024-11-09 05:37:27,274 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:37:27,274 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:37:27,275 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:37:27,275 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:37:27,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:37:27,556 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:37:29,017 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12360#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:37:29,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:37:29,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:37:29,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 64 [2024-11-09 05:37:29,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440194591] [2024-11-09 05:37:29,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:37:29,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-09 05:37:29,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:37:29,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-09 05:37:29,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=4880, Unknown=0, NotChecked=0, Total=5112 [2024-11-09 05:37:29,020 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand has 65 states, 65 states have (on average 3.2615384615384615) internal successors, (212), 64 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:37:30,875 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2024-11-09 05:37:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 05:37:30,876 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.2615384615384615) internal successors, (212), 64 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-11-09 05:37:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:37:30,877 INFO L225 Difference]: With dead ends: 149 [2024-11-09 05:37:30,877 INFO L226 Difference]: Without dead ends: 147 [2024-11-09 05:37:30,878 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 163 SyntacticMatches, 10 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=334, Invalid=6308, Unknown=0, NotChecked=0, Total=6642 [2024-11-09 05:37:30,879 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 139 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 2281 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:37:30,879 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 400 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2281 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 05:37:30,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-09 05:37:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2024-11-09 05:37:30,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.128440366972477) internal successors, (123), 109 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:30,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2024-11-09 05:37:30,904 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 74 [2024-11-09 05:37:30,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:37:30,904 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2024-11-09 05:37:30,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.2615384615384615) internal successors, (212), 64 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:30,905 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2024-11-09 05:37:30,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 05:37:30,905 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:37:30,905 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2024-11-09 05:37:30,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-09 05:37:31,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 05:37:31,106 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:37:31,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:37:31,107 INFO L85 PathProgramCache]: Analyzing trace with hash -776694176, now seen corresponding path program 21 times [2024-11-09 05:37:31,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:37:31,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207172504] [2024-11-09 05:37:31,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:37:31,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:37:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:37:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 138 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:31,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:37:31,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207172504] [2024-11-09 05:37:31,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207172504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:37:31,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731530398] [2024-11-09 05:37:31,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:37:31,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:37:31,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:37:31,689 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:37:31,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 05:37:32,209 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:37:32,209 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:37:32,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 05:37:32,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:37:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 171 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:32,645 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:37:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 171 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:32,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731530398] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:37:32,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1337240242] [2024-11-09 05:37:32,962 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:37:32,963 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:37:32,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:37:32,963 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:37:32,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:37:33,177 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:37:33,880 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13200#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:37:33,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:37:33,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:37:33,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 34 [2024-11-09 05:37:33,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698969312] [2024-11-09 05:37:33,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:37:33,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 05:37:33,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:37:33,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 05:37:33,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1409, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 05:37:33,882 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:34,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:37:34,212 INFO L93 Difference]: Finished difference Result 154 states and 167 transitions. [2024-11-09 05:37:34,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 05:37:34,213 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2024-11-09 05:37:34,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:37:34,214 INFO L225 Difference]: With dead ends: 154 [2024-11-09 05:37:34,218 INFO L226 Difference]: Without dead ends: 110 [2024-11-09 05:37:34,218 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 176 SyntacticMatches, 29 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=313, Invalid=1409, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 05:37:34,219 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:37:34,219 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:37:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-09 05:37:34,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2024-11-09 05:37:34,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1192660550458715) internal successors, (122), 109 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:34,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2024-11-09 05:37:34,258 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 75 [2024-11-09 05:37:34,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:37:34,258 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2024-11-09 05:37:34,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:34,259 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2024-11-09 05:37:34,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-09 05:37:34,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:37:34,260 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2024-11-09 05:37:34,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-09 05:37:34,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 05:37:34,460 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:37:34,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:37:34,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1391056115, now seen corresponding path program 22 times [2024-11-09 05:37:34,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:37:34,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831308364] [2024-11-09 05:37:34,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:37:34,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:37:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:37:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:35,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:37:35,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831308364] [2024-11-09 05:37:35,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831308364] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:37:35,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451523323] [2024-11-09 05:37:35,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:37:35,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:37:35,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:37:35,693 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:37:35,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 05:37:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:37:35,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-09 05:37:35,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:37:36,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:37:37,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:37:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:37,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:37:38,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:37:38,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:37:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:38,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451523323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:37:38,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1788828044] [2024-11-09 05:37:38,841 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:37:38,841 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:37:38,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:37:38,842 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:37:38,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:37:39,145 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:37:39,960 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14080#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:37:39,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:37:39,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:37:39,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2024-11-09 05:37:39,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203059203] [2024-11-09 05:37:39,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:37:39,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-09 05:37:39,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:37:39,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-09 05:37:39,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=5595, Unknown=0, NotChecked=0, Total=5852 [2024-11-09 05:37:39,964 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand has 70 states, 70 states have (on average 3.3) internal successors, (231), 69 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:41,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:37:41,750 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2024-11-09 05:37:41,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 05:37:41,751 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.3) internal successors, (231), 69 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2024-11-09 05:37:41,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:37:41,752 INFO L225 Difference]: With dead ends: 159 [2024-11-09 05:37:41,752 INFO L226 Difference]: Without dead ends: 157 [2024-11-09 05:37:41,753 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=272, Invalid=5890, Unknown=0, NotChecked=0, Total=6162 [2024-11-09 05:37:41,754 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 2912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:37:41,755 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 704 Invalid, 2912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2912 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-09 05:37:41,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-09 05:37:41,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 115. [2024-11-09 05:37:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1140350877192982) internal successors, (127), 114 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2024-11-09 05:37:41,798 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 78 [2024-11-09 05:37:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:37:41,798 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2024-11-09 05:37:41,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.3) internal successors, (231), 69 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:41,799 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2024-11-09 05:37:41,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 05:37:41,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:37:41,800 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2024-11-09 05:37:41,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-09 05:37:42,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 05:37:42,001 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:37:42,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:37:42,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1303034688, now seen corresponding path program 23 times [2024-11-09 05:37:42,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:37:42,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143382999] [2024-11-09 05:37:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:37:42,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:37:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:37:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:43,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:37:43,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143382999] [2024-11-09 05:37:43,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143382999] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:37:43,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270429614] [2024-11-09 05:37:43,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:37:43,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:37:43,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:37:43,295 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:37:43,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-09 05:37:43,967 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-09 05:37:43,968 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:37:43,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-09 05:37:43,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:37:44,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:37:44,204 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:37:44,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:37:44,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:37:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:44,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:37:45,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:37:45,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2024-11-09 05:37:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:46,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270429614] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:37:46,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2092282458] [2024-11-09 05:37:46,300 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:37:46,301 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:37:46,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:37:46,301 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:37:46,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:37:46,524 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:37:48,230 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14984#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:37:48,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:37:48,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:37:48,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 60 [2024-11-09 05:37:48,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944724189] [2024-11-09 05:37:48,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:37:48,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-09 05:37:48,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:37:48,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-09 05:37:48,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=4344, Unknown=0, NotChecked=0, Total=4556 [2024-11-09 05:37:48,233 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 61 states, 61 states have (on average 3.3442622950819674) internal successors, (204), 60 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:37:50,134 INFO L93 Difference]: Finished difference Result 157 states and 169 transitions. [2024-11-09 05:37:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 05:37:50,134 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.3442622950819674) internal successors, (204), 60 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2024-11-09 05:37:50,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:37:50,136 INFO L225 Difference]: With dead ends: 157 [2024-11-09 05:37:50,136 INFO L226 Difference]: Without dead ends: 155 [2024-11-09 05:37:50,136 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 189 SyntacticMatches, 11 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=324, Invalid=5838, Unknown=0, NotChecked=0, Total=6162 [2024-11-09 05:37:50,137 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 102 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 2687 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 2689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:37:50,137 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 484 Invalid, 2689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2687 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 05:37:50,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-09 05:37:50,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 114. [2024-11-09 05:37:50,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 113 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2024-11-09 05:37:50,178 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 81 [2024-11-09 05:37:50,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:37:50,178 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2024-11-09 05:37:50,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.3442622950819674) internal successors, (204), 60 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:50,179 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2024-11-09 05:37:50,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-09 05:37:50,179 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:37:50,180 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2024-11-09 05:37:50,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-09 05:37:50,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:37:50,380 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:37:50,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:37:50,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1717967116, now seen corresponding path program 24 times [2024-11-09 05:37:50,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:37:50,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682249045] [2024-11-09 05:37:50,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:37:50,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:37:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:37:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 173 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:50,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:37:50,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682249045] [2024-11-09 05:37:50,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682249045] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:37:50,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771465272] [2024-11-09 05:37:50,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:37:50,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:37:51,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:37:51,001 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:37:51,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-09 05:37:51,329 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:37:51,329 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:37:51,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 05:37:51,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:37:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 210 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:51,832 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:37:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 210 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:52,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771465272] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:37:52,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [414484277] [2024-11-09 05:37:52,206 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:37:52,206 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:37:52,206 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:37:52,206 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:37:52,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:37:52,469 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:37:53,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15886#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:37:53,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:37:53,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:37:53,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 37 [2024-11-09 05:37:53,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351814297] [2024-11-09 05:37:53,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:37:53,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-09 05:37:53,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:37:53,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-09 05:37:53,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1617, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 05:37:53,363 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 38 states, 38 states have (on average 3.5) internal successors, (133), 37 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:37:53,681 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2024-11-09 05:37:53,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 05:37:53,682 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5) internal successors, (133), 37 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2024-11-09 05:37:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:37:53,683 INFO L225 Difference]: With dead ends: 162 [2024-11-09 05:37:53,683 INFO L226 Difference]: Without dead ends: 114 [2024-11-09 05:37:53,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 193 SyntacticMatches, 32 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=363, Invalid=1617, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 05:37:53,684 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:37:53,685 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 129 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:37:53,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-09 05:37:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-11-09 05:37:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1061946902654867) internal successors, (125), 113 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 125 transitions. [2024-11-09 05:37:53,728 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 125 transitions. Word has length 82 [2024-11-09 05:37:53,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:37:53,728 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 125 transitions. [2024-11-09 05:37:53,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5) internal successors, (133), 37 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:37:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 125 transitions. [2024-11-09 05:37:53,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-09 05:37:53,729 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:37:53,729 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2024-11-09 05:37:53,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-09 05:37:53,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-09 05:37:53,930 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:37:53,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:37:53,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1070258777, now seen corresponding path program 25 times [2024-11-09 05:37:53,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:37:53,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510309187] [2024-11-09 05:37:53,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:37:53,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:37:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:37:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:55,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:37:55,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510309187] [2024-11-09 05:37:55,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510309187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:37:55,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397434849] [2024-11-09 05:37:55,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:37:55,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:37:55,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:37:55,301 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:37:55,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-09 05:37:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:37:55,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-09 05:37:55,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:37:56,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:37:57,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:37:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:57,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:37:58,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:37:58,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:37:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:37:58,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397434849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:37:58,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [283782024] [2024-11-09 05:37:58,982 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:37:58,982 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:37:58,982 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:37:58,982 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:37:58,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:37:59,269 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:38:01,209 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16829#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:38:01,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:38:01,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:38:01,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 75 [2024-11-09 05:38:01,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412729722] [2024-11-09 05:38:01,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:38:01,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-09 05:38:01,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:38:01,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-09 05:38:01,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=6528, Unknown=0, NotChecked=0, Total=6806 [2024-11-09 05:38:01,212 INFO L87 Difference]: Start difference. First operand 114 states and 125 transitions. Second operand has 76 states, 76 states have (on average 3.3157894736842106) internal successors, (252), 75 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:38:03,398 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2024-11-09 05:38:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 05:38:03,398 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.3157894736842106) internal successors, (252), 75 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2024-11-09 05:38:03,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:38:03,399 INFO L225 Difference]: With dead ends: 167 [2024-11-09 05:38:03,399 INFO L226 Difference]: Without dead ends: 165 [2024-11-09 05:38:03,400 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 187 SyntacticMatches, 11 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=293, Invalid=6847, Unknown=0, NotChecked=0, Total=7140 [2024-11-09 05:38:03,400 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 3745 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 3745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:38:03,400 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 886 Invalid, 3745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3745 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-09 05:38:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-09 05:38:03,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 119. [2024-11-09 05:38:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.1016949152542372) internal successors, (130), 118 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2024-11-09 05:38:03,432 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 85 [2024-11-09 05:38:03,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:38:03,432 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2024-11-09 05:38:03,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.3157894736842106) internal successors, (252), 75 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:03,433 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2024-11-09 05:38:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 05:38:03,433 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:38:03,433 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2024-11-09 05:38:03,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-09 05:38:03,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-09 05:38:03,634 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:38:03,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:38:03,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1815774740, now seen corresponding path program 26 times [2024-11-09 05:38:03,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:38:03,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791706061] [2024-11-09 05:38:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:38:03,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:38:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:38:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:04,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:38:04,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791706061] [2024-11-09 05:38:04,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791706061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:38:04,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712690150] [2024-11-09 05:38:04,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:38:04,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:38:04,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:38:04,995 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:38:04,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-09 05:38:05,498 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-09 05:38:05,498 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:38:05,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-09 05:38:05,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:38:05,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:38:05,698 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:38:05,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:38:06,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:38:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:06,244 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:38:06,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:38:06,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2024-11-09 05:38:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:07,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712690150] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:38:07,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1520338565] [2024-11-09 05:38:07,650 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:38:07,651 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:38:07,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:38:07,651 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:38:07,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:38:07,839 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:38:08,473 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17795#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:38:08,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:38:08,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:38:08,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 65 [2024-11-09 05:38:08,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007883065] [2024-11-09 05:38:08,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:38:08,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-09 05:38:08,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:38:08,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-09 05:38:08,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=5028, Unknown=0, NotChecked=0, Total=5256 [2024-11-09 05:38:08,476 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand has 66 states, 66 states have (on average 3.3636363636363638) internal successors, (222), 65 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:10,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:38:10,897 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2024-11-09 05:38:10,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 05:38:10,898 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.3636363636363638) internal successors, (222), 65 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2024-11-09 05:38:10,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:38:10,899 INFO L225 Difference]: With dead ends: 165 [2024-11-09 05:38:10,899 INFO L226 Difference]: Without dead ends: 163 [2024-11-09 05:38:10,900 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=350, Invalid=6790, Unknown=0, NotChecked=0, Total=7140 [2024-11-09 05:38:10,901 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 116 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 2999 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 3001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:38:10,901 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 528 Invalid, 3001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2999 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-09 05:38:10,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-09 05:38:10,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2024-11-09 05:38:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1025641025641026) internal successors, (129), 117 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:10,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 129 transitions. [2024-11-09 05:38:10,954 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 129 transitions. Word has length 88 [2024-11-09 05:38:10,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:38:10,954 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 129 transitions. [2024-11-09 05:38:10,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.3636363636363638) internal successors, (222), 65 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:10,955 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 129 transitions. [2024-11-09 05:38:10,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-09 05:38:10,955 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:38:10,956 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2024-11-09 05:38:10,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-09 05:38:11,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-09 05:38:11,157 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:38:11,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:38:11,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1188690802, now seen corresponding path program 27 times [2024-11-09 05:38:11,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:38:11,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514732194] [2024-11-09 05:38:11,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:38:11,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:38:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:38:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 212 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:11,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:38:11,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514732194] [2024-11-09 05:38:11,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514732194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:38:11,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713555692] [2024-11-09 05:38:11,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:38:11,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:38:11,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:38:11,856 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:38:11,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-09 05:38:12,298 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:38:12,298 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:38:12,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 05:38:12,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:38:12,949 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 253 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:12,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:38:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 253 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:13,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713555692] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:38:13,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [641029037] [2024-11-09 05:38:13,412 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:38:13,412 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:38:13,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:38:13,412 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:38:13,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:38:13,752 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:38:14,612 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18759#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:38:14,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:38:14,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:38:14,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 40 [2024-11-09 05:38:14,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325863432] [2024-11-09 05:38:14,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:38:14,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 05:38:14,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:38:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 05:38:14,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1839, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 05:38:14,615 INFO L87 Difference]: Start difference. First operand 118 states and 129 transitions. Second operand has 41 states, 41 states have (on average 3.5121951219512195) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:14,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:38:14,926 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2024-11-09 05:38:14,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 05:38:14,927 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.5121951219512195) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2024-11-09 05:38:14,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:38:14,928 INFO L225 Difference]: With dead ends: 170 [2024-11-09 05:38:14,928 INFO L226 Difference]: Without dead ends: 118 [2024-11-09 05:38:14,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 210 SyntacticMatches, 35 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=417, Invalid=1839, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 05:38:14,929 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:38:14,929 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:38:14,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-09 05:38:14,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2024-11-09 05:38:14,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0940170940170941) internal successors, (128), 117 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2024-11-09 05:38:14,976 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 89 [2024-11-09 05:38:14,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:38:14,976 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2024-11-09 05:38:14,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5121951219512195) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:14,977 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2024-11-09 05:38:14,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-09 05:38:14,977 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:38:14,977 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2024-11-09 05:38:14,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-09 05:38:15,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-09 05:38:15,178 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:38:15,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:38:15,178 INFO L85 PathProgramCache]: Analyzing trace with hash 695953019, now seen corresponding path program 28 times [2024-11-09 05:38:15,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:38:15,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619315720] [2024-11-09 05:38:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:38:15,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:38:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:38:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 0 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:16,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:38:16,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619315720] [2024-11-09 05:38:16,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619315720] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:38:16,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429964985] [2024-11-09 05:38:16,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:38:16,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:38:16,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:38:16,731 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:38:16,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-09 05:38:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:38:16,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-09 05:38:16,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:38:17,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:38:17,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:38:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 0 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:17,479 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:38:18,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:38:18,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:38:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 0 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:19,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429964985] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:38:19,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1593078496] [2024-11-09 05:38:19,019 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:38:19,020 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:38:19,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:38:19,020 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:38:19,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:38:19,232 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:38:19,832 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19740#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:38:19,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:38:19,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:38:19,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2024-11-09 05:38:19,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453915528] [2024-11-09 05:38:19,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:38:19,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-09 05:38:19,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:38:19,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-09 05:38:19,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2024-11-09 05:38:19,834 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand has 57 states, 57 states have (on average 3.2982456140350878) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:21,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:38:21,590 INFO L93 Difference]: Finished difference Result 175 states and 185 transitions. [2024-11-09 05:38:21,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 05:38:21,591 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.2982456140350878) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2024-11-09 05:38:21,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:38:21,592 INFO L225 Difference]: With dead ends: 175 [2024-11-09 05:38:21,592 INFO L226 Difference]: Without dead ends: 173 [2024-11-09 05:38:21,593 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=194, Invalid=3966, Unknown=0, NotChecked=0, Total=4160 [2024-11-09 05:38:21,593 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 3027 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 3027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:38:21,593 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 695 Invalid, 3027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3027 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-09 05:38:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-09 05:38:21,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 123. [2024-11-09 05:38:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0901639344262295) internal successors, (133), 122 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2024-11-09 05:38:21,635 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 92 [2024-11-09 05:38:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:38:21,636 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2024-11-09 05:38:21,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.2982456140350878) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2024-11-09 05:38:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-09 05:38:21,637 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:38:21,637 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2024-11-09 05:38:21,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-09 05:38:21,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-09 05:38:21,838 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:38:21,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:38:21,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1987436178, now seen corresponding path program 29 times [2024-11-09 05:38:21,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:38:21,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616368761] [2024-11-09 05:38:21,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:38:21,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:38:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:38:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 0 proven. 568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:23,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:38:23,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616368761] [2024-11-09 05:38:23,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616368761] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:38:23,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617580127] [2024-11-09 05:38:23,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:38:23,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:38:23,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:38:23,862 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:38:23,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-09 05:38:24,621 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-09 05:38:24,621 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:38:24,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-09 05:38:24,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:38:25,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:38:25,320 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:38:25,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:38:26,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:38:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 0 proven. 568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:26,307 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:38:27,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:38:27,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-09 05:38:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 0 proven. 568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:27,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617580127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:38:27,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1201845652] [2024-11-09 05:38:27,992 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:38:27,992 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:38:27,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:38:27,992 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:38:27,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:38:28,184 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:38:29,922 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20780#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:38:29,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:38:29,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:38:29,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 84 [2024-11-09 05:38:29,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476591550] [2024-11-09 05:38:29,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:38:29,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-09 05:38:29,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:38:29,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-09 05:38:29,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=8032, Unknown=0, NotChecked=0, Total=8372 [2024-11-09 05:38:29,925 INFO L87 Difference]: Start difference. First operand 123 states and 133 transitions. Second operand has 85 states, 85 states have (on average 3.3176470588235296) internal successors, (282), 84 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:33,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:38:33,212 INFO L93 Difference]: Finished difference Result 173 states and 183 transitions. [2024-11-09 05:38:33,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 05:38:33,212 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.3176470588235296) internal successors, (282), 84 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2024-11-09 05:38:33,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:38:33,213 INFO L225 Difference]: With dead ends: 173 [2024-11-09 05:38:33,213 INFO L226 Difference]: Without dead ends: 171 [2024-11-09 05:38:33,214 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 209 SyntacticMatches, 13 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4205 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=507, Invalid=10623, Unknown=0, NotChecked=0, Total=11130 [2024-11-09 05:38:33,215 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 195 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 3914 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 3917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 3914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:38:33,215 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 665 Invalid, 3917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 3914 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-09 05:38:33,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-09 05:38:33,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 122. [2024-11-09 05:38:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0909090909090908) internal successors, (132), 121 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:33,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2024-11-09 05:38:33,252 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 95 [2024-11-09 05:38:33,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:38:33,252 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2024-11-09 05:38:33,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.3176470588235296) internal successors, (282), 84 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2024-11-09 05:38:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-09 05:38:33,253 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:38:33,253 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2024-11-09 05:38:33,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-09 05:38:33,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-09 05:38:33,454 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:38:33,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:38:33,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1594377374, now seen corresponding path program 30 times [2024-11-09 05:38:33,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:38:33,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091403602] [2024-11-09 05:38:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:38:33,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:38:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:38:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 255 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:34,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:38:34,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091403602] [2024-11-09 05:38:34,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091403602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:38:34,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744752132] [2024-11-09 05:38:34,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:38:34,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:38:34,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:38:34,153 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:38:34,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-09 05:38:34,656 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:38:34,656 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:38:34,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 05:38:34,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:38:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 300 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:35,240 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:38:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 300 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:35,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744752132] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:38:35,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1328391979] [2024-11-09 05:38:35,695 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:38:35,695 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:38:35,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:38:35,695 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:38:35,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:38:35,889 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:38:36,430 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21808#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:38:36,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:38:36,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:38:36,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 43 [2024-11-09 05:38:36,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402093905] [2024-11-09 05:38:36,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:38:36,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 05:38:36,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:38:36,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 05:38:36,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2067, Unknown=0, NotChecked=0, Total=2550 [2024-11-09 05:38:36,433 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand has 44 states, 44 states have (on average 3.522727272727273) internal successors, (155), 43 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:36,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:38:36,811 INFO L93 Difference]: Finished difference Result 178 states and 188 transitions. [2024-11-09 05:38:36,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 05:38:36,812 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.522727272727273) internal successors, (155), 43 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2024-11-09 05:38:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:38:36,813 INFO L225 Difference]: With dead ends: 178 [2024-11-09 05:38:36,813 INFO L226 Difference]: Without dead ends: 122 [2024-11-09 05:38:36,813 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 239 SyntacticMatches, 26 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=483, Invalid=2067, Unknown=0, NotChecked=0, Total=2550 [2024-11-09 05:38:36,813 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:38:36,814 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 143 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:38:36,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-09 05:38:36,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2024-11-09 05:38:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0826446280991735) internal successors, (131), 121 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2024-11-09 05:38:36,877 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 96 [2024-11-09 05:38:36,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:38:36,878 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2024-11-09 05:38:36,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.522727272727273) internal successors, (155), 43 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:36,878 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2024-11-09 05:38:36,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-09 05:38:36,879 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:38:36,879 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2024-11-09 05:38:36,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-09 05:38:37,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-09 05:38:37,081 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:38:37,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:38:37,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1803959083, now seen corresponding path program 31 times [2024-11-09 05:38:37,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:38:37,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105420970] [2024-11-09 05:38:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:38:37,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:38:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:38:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 0 proven. 615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:38,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:38:38,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105420970] [2024-11-09 05:38:38,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105420970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:38:38,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116358801] [2024-11-09 05:38:38,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:38:38,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:38:38,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:38:38,805 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:38:38,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-09 05:38:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:38:39,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-09 05:38:39,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:38:39,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:38:40,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:38:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 0 proven. 615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:40,948 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:38:41,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:38:41,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:38:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 0 proven. 615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:43,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116358801] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:38:43,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [864447868] [2024-11-09 05:38:43,117 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:38:43,117 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:38:43,117 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:38:43,117 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:38:43,117 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:38:43,333 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:38:44,659 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22877#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:38:44,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:38:44,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:38:44,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 87 [2024-11-09 05:38:44,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008955092] [2024-11-09 05:38:44,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:38:44,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-09 05:38:44,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:38:44,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-09 05:38:44,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=8602, Unknown=0, NotChecked=0, Total=8930 [2024-11-09 05:38:44,664 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand has 88 states, 88 states have (on average 3.340909090909091) internal successors, (294), 87 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:47,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:38:47,164 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2024-11-09 05:38:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 05:38:47,164 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.340909090909091) internal successors, (294), 87 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2024-11-09 05:38:47,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:38:47,165 INFO L225 Difference]: With dead ends: 183 [2024-11-09 05:38:47,165 INFO L226 Difference]: Without dead ends: 181 [2024-11-09 05:38:47,166 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=343, Invalid=8969, Unknown=0, NotChecked=0, Total=9312 [2024-11-09 05:38:47,167 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 4335 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 4335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:38:47,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 966 Invalid, 4335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4335 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-09 05:38:47,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-09 05:38:47,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 127. [2024-11-09 05:38:47,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0793650793650793) internal successors, (136), 126 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:47,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 136 transitions. [2024-11-09 05:38:47,206 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 136 transitions. Word has length 99 [2024-11-09 05:38:47,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:38:47,207 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 136 transitions. [2024-11-09 05:38:47,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.340909090909091) internal successors, (294), 87 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:47,207 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 136 transitions. [2024-11-09 05:38:47,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-09 05:38:47,208 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:38:47,208 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2024-11-09 05:38:47,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-09 05:38:47,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-09 05:38:47,408 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:38:47,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:38:47,409 INFO L85 PathProgramCache]: Analyzing trace with hash -570203518, now seen corresponding path program 32 times [2024-11-09 05:38:47,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:38:47,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268012487] [2024-11-09 05:38:47,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:38:47,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:38:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:38:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:48,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:38:48,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268012487] [2024-11-09 05:38:48,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268012487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:38:48,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264001942] [2024-11-09 05:38:48,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:38:48,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:38:48,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:38:48,844 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:38:48,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-09 05:38:49,758 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-09 05:38:49,758 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:38:49,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-09 05:38:49,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:38:49,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:38:50,056 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:38:50,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:38:50,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:38:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:50,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:38:51,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:38:51,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2024-11-09 05:38:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:52,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264001942] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:38:52,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1090906709] [2024-11-09 05:38:52,982 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:38:52,982 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:38:52,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:38:52,983 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:38:52,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:38:53,172 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:38:55,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23969#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:38:55,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:38:55,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:38:55,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 77 [2024-11-09 05:38:55,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748161852] [2024-11-09 05:38:55,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:38:55,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-09 05:38:55,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:38:55,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-09 05:38:55,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=6859, Unknown=0, NotChecked=0, Total=7140 [2024-11-09 05:38:55,497 INFO L87 Difference]: Start difference. First operand 127 states and 136 transitions. Second operand has 78 states, 78 states have (on average 3.3076923076923075) internal successors, (258), 77 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:58,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:38:58,777 INFO L93 Difference]: Finished difference Result 181 states and 190 transitions. [2024-11-09 05:38:58,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-09 05:38:58,777 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.3076923076923075) internal successors, (258), 77 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2024-11-09 05:38:58,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:38:58,778 INFO L225 Difference]: With dead ends: 181 [2024-11-09 05:38:58,778 INFO L226 Difference]: Without dead ends: 179 [2024-11-09 05:38:58,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 239 SyntacticMatches, 13 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=437, Invalid=9463, Unknown=0, NotChecked=0, Total=9900 [2024-11-09 05:38:58,780 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 136 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 4272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 4274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:38:58,780 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 653 Invalid, 4274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4272 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-09 05:38:58,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-09 05:38:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 126. [2024-11-09 05:38:58,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.08) internal successors, (135), 125 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2024-11-09 05:38:58,836 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 102 [2024-11-09 05:38:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:38:58,837 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2024-11-09 05:38:58,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.3076923076923075) internal successors, (258), 77 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:38:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2024-11-09 05:38:58,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-09 05:38:58,838 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:38:58,838 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2024-11-09 05:38:58,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-09 05:38:59,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-09 05:38:59,038 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:38:59,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:38:59,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1903469380, now seen corresponding path program 33 times [2024-11-09 05:38:59,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:38:59,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119107401] [2024-11-09 05:38:59,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:38:59,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:38:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:38:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 302 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:38:59,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:38:59,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119107401] [2024-11-09 05:38:59,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119107401] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:38:59,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172185046] [2024-11-09 05:38:59,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:38:59,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:38:59,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:38:59,774 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:38:59,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-09 05:39:00,390 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:39:00,390 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:39:00,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 05:39:00,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:39:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 351 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:01,082 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:39:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 351 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:01,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172185046] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:39:01,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2045091159] [2024-11-09 05:39:01,612 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:39:01,612 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:39:01,612 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:39:01,612 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:39:01,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:39:01,809 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:39:02,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25059#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:39:02,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:39:02,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:39:02,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2024-11-09 05:39:02,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717882199] [2024-11-09 05:39:02,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:39:02,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-09 05:39:02,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:39:02,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-09 05:39:02,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=2317, Unknown=0, NotChecked=0, Total=2862 [2024-11-09 05:39:02,452 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 46 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:39:02,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:39:02,916 INFO L93 Difference]: Finished difference Result 186 states and 195 transitions. [2024-11-09 05:39:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 05:39:02,917 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 46 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2024-11-09 05:39:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:39:02,918 INFO L225 Difference]: With dead ends: 186 [2024-11-09 05:39:02,919 INFO L226 Difference]: Without dead ends: 126 [2024-11-09 05:39:02,919 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 257 SyntacticMatches, 28 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1743 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=545, Invalid=2317, Unknown=0, NotChecked=0, Total=2862 [2024-11-09 05:39:02,920 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:39:02,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 144 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:39:02,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-09 05:39:02,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-11-09 05:39:02,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.072) internal successors, (134), 125 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:39:02,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 134 transitions. [2024-11-09 05:39:02,978 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 134 transitions. Word has length 103 [2024-11-09 05:39:02,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:39:02,979 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 134 transitions. [2024-11-09 05:39:02,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 46 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:39:02,979 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 134 transitions. [2024-11-09 05:39:02,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-09 05:39:02,980 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:39:02,980 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2024-11-09 05:39:03,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-09 05:39:03,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-09 05:39:03,181 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:39:03,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:39:03,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1719378967, now seen corresponding path program 34 times [2024-11-09 05:39:03,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:39:03,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913406719] [2024-11-09 05:39:03,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:39:03,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:39:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:39:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 0 proven. 711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:04,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:39:04,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913406719] [2024-11-09 05:39:04,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913406719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:39:04,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810277922] [2024-11-09 05:39:04,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:39:04,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:39:04,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:39:04,731 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:39:04,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-09 05:39:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:39:05,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-09 05:39:05,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:39:06,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:39:07,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:39:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 0 proven. 711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:07,465 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:39:08,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:39:08,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:39:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 0 proven. 711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:10,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810277922] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:39:10,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [44630953] [2024-11-09 05:39:10,049 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:39:10,049 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:39:10,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:39:10,050 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:39:10,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:39:10,274 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:39:13,316 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26191#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:39:13,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:39:13,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:39:13,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 93 [2024-11-09 05:39:13,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070276976] [2024-11-09 05:39:13,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:39:13,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-11-09 05:39:13,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:39:13,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-11-09 05:39:13,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=9751, Unknown=0, NotChecked=0, Total=10100 [2024-11-09 05:39:13,319 INFO L87 Difference]: Start difference. First operand 126 states and 134 transitions. Second operand has 94 states, 94 states have (on average 3.351063829787234) internal successors, (315), 93 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:39:16,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:39:16,483 INFO L93 Difference]: Finished difference Result 191 states and 199 transitions. [2024-11-09 05:39:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 05:39:16,483 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.351063829787234) internal successors, (315), 93 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2024-11-09 05:39:16,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:39:16,485 INFO L225 Difference]: With dead ends: 191 [2024-11-09 05:39:16,485 INFO L226 Difference]: Without dead ends: 189 [2024-11-09 05:39:16,486 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 235 SyntacticMatches, 14 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3289 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=364, Invalid=10142, Unknown=0, NotChecked=0, Total=10506 [2024-11-09 05:39:16,486 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 5209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 5209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:39:16,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1106 Invalid, 5209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5209 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-09 05:39:16,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-09 05:39:16,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 131. [2024-11-09 05:39:16,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0692307692307692) internal successors, (139), 130 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:39:16,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 139 transitions. [2024-11-09 05:39:16,566 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 139 transitions. Word has length 106 [2024-11-09 05:39:16,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:39:16,567 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 139 transitions. [2024-11-09 05:39:16,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.351063829787234) internal successors, (315), 93 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:39:16,567 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 139 transitions. [2024-11-09 05:39:16,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-09 05:39:16,568 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:39:16,568 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2024-11-09 05:39:16,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-09 05:39:16,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:39:16,769 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:39:16,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:39:16,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2139845020, now seen corresponding path program 35 times [2024-11-09 05:39:16,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:39:16,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59062364] [2024-11-09 05:39:16,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:39:16,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:39:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:39:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:18,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:39:18,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59062364] [2024-11-09 05:39:18,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59062364] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:39:18,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326322897] [2024-11-09 05:39:18,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:39:18,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:39:18,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:39:18,593 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:39:18,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-09 05:39:19,901 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-09 05:39:19,901 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:39:19,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-09 05:39:19,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:39:20,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:39:20,298 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:39:20,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:39:21,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:39:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:21,427 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:39:22,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:39:22,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2024-11-09 05:39:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:24,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326322897] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:39:24,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1053872347] [2024-11-09 05:39:24,199 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:39:24,200 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:39:24,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:39:24,200 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:39:24,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:39:24,446 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:39:27,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27345#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:39:27,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:39:27,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:39:27,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 82 [2024-11-09 05:39:27,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017289492] [2024-11-09 05:39:27,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:39:27,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-09 05:39:27,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:39:27,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-09 05:39:27,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=7713, Unknown=0, NotChecked=0, Total=8010 [2024-11-09 05:39:27,493 INFO L87 Difference]: Start difference. First operand 131 states and 139 transitions. Second operand has 83 states, 83 states have (on average 3.325301204819277) internal successors, (276), 82 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:39:31,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:39:31,790 INFO L93 Difference]: Finished difference Result 189 states and 197 transitions. [2024-11-09 05:39:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 05:39:31,791 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.325301204819277) internal successors, (276), 82 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2024-11-09 05:39:31,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:39:31,792 INFO L225 Difference]: With dead ends: 189 [2024-11-09 05:39:31,792 INFO L226 Difference]: Without dead ends: 187 [2024-11-09 05:39:31,793 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 256 SyntacticMatches, 14 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2923 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=463, Invalid=10667, Unknown=0, NotChecked=0, Total=11130 [2024-11-09 05:39:31,793 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 134 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 5444 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 5446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:39:31,793 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 830 Invalid, 5446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5444 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-09 05:39:31,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-09 05:39:31,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 130. [2024-11-09 05:39:31,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.069767441860465) internal successors, (138), 129 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:39:31,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2024-11-09 05:39:31,843 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 109 [2024-11-09 05:39:31,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:39:31,843 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2024-11-09 05:39:31,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.325301204819277) internal successors, (276), 82 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:39:31,844 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2024-11-09 05:39:31,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-09 05:39:31,844 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:39:31,844 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2024-11-09 05:39:31,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-09 05:39:32,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:39:32,045 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:39:32,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:39:32,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1334594000, now seen corresponding path program 36 times [2024-11-09 05:39:32,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:39:32,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480100632] [2024-11-09 05:39:32,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:39:32,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:39:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:39:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 353 proven. 413 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:32,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:39:32,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480100632] [2024-11-09 05:39:32,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480100632] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:39:32,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399557314] [2024-11-09 05:39:32,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:39:32,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:39:32,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:39:32,916 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:39:32,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-09 05:39:33,636 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:39:33,636 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:39:33,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 05:39:33,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:39:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 406 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:34,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:39:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 406 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:35,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399557314] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:39:35,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1493970328] [2024-11-09 05:39:35,084 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:39:35,084 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:39:35,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:39:35,084 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:39:35,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:39:35,273 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:39:35,879 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28497#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:39:35,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:39:35,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:39:35,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 49 [2024-11-09 05:39:35,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092967906] [2024-11-09 05:39:35,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:39:35,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-09 05:39:35,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:39:35,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-09 05:39:35,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2581, Unknown=0, NotChecked=0, Total=3192 [2024-11-09 05:39:35,882 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand has 50 states, 50 states have (on average 3.54) internal successors, (177), 49 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:39:36,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:39:36,351 INFO L93 Difference]: Finished difference Result 194 states and 202 transitions. [2024-11-09 05:39:36,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 05:39:36,352 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 49 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2024-11-09 05:39:36,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:39:36,353 INFO L225 Difference]: With dead ends: 194 [2024-11-09 05:39:36,353 INFO L226 Difference]: Without dead ends: 130 [2024-11-09 05:39:36,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 275 SyntacticMatches, 30 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=611, Invalid=2581, Unknown=0, NotChecked=0, Total=3192 [2024-11-09 05:39:36,354 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:39:36,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 176 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:39:36,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-09 05:39:36,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2024-11-09 05:39:36,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.062015503875969) internal successors, (137), 129 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:39:36,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 137 transitions. [2024-11-09 05:39:36,422 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 137 transitions. Word has length 110 [2024-11-09 05:39:36,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:39:36,423 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 137 transitions. [2024-11-09 05:39:36,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 49 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:39:36,423 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 137 transitions. [2024-11-09 05:39:36,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-09 05:39:36,424 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:39:36,424 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2024-11-09 05:39:36,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-09 05:39:36,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:39:36,625 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:39:36,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:39:36,625 INFO L85 PathProgramCache]: Analyzing trace with hash 198921731, now seen corresponding path program 37 times [2024-11-09 05:39:36,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:39:36,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935219833] [2024-11-09 05:39:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:39:36,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:39:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:39:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 0 proven. 814 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:38,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:39:38,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935219833] [2024-11-09 05:39:38,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935219833] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:39:38,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393454856] [2024-11-09 05:39:38,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:39:38,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:39:38,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:39:38,700 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:39:38,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-09 05:39:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:39:39,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-09 05:39:39,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:39:40,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:39:41,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:39:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 0 proven. 814 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:41,888 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:39:43,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:39:43,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:39:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 0 proven. 814 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:45,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393454856] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:39:45,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1895414890] [2024-11-09 05:39:45,034 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:39:45,034 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:39:45,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:39:45,035 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:39:45,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:39:45,223 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:39:46,577 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29692#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:39:46,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:39:46,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:39:46,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 99 [2024-11-09 05:39:46,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332081071] [2024-11-09 05:39:46,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:39:46,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2024-11-09 05:39:46,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:39:46,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2024-11-09 05:39:46,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=10972, Unknown=0, NotChecked=0, Total=11342 [2024-11-09 05:39:46,582 INFO L87 Difference]: Start difference. First operand 130 states and 137 transitions. Second operand has 100 states, 100 states have (on average 3.36) internal successors, (336), 99 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:39:50,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:39:50,190 INFO L93 Difference]: Finished difference Result 199 states and 206 transitions. [2024-11-09 05:39:50,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 05:39:50,191 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.36) internal successors, (336), 99 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2024-11-09 05:39:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:39:50,191 INFO L225 Difference]: With dead ends: 199 [2024-11-09 05:39:50,192 INFO L226 Difference]: Without dead ends: 197 [2024-11-09 05:39:50,192 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2751 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=385, Invalid=11387, Unknown=0, NotChecked=0, Total=11772 [2024-11-09 05:39:50,193 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 5691 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 5691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:39:50,193 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1222 Invalid, 5691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5691 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-09 05:39:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-09 05:39:50,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 135. [2024-11-09 05:39:50,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0597014925373134) internal successors, (142), 134 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:39:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 142 transitions. [2024-11-09 05:39:50,268 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 142 transitions. Word has length 113 [2024-11-09 05:39:50,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:39:50,268 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 142 transitions. [2024-11-09 05:39:50,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.36) internal successors, (336), 99 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:39:50,268 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 142 transitions. [2024-11-09 05:39:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-09 05:39:50,269 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:39:50,269 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2024-11-09 05:39:50,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-09 05:39:50,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:39:50,470 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:39:50,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:39:50,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1156253456, now seen corresponding path program 38 times [2024-11-09 05:39:50,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:39:50,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631676634] [2024-11-09 05:39:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:39:50,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:39:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:39:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 0 proven. 865 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:52,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:39:52,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631676634] [2024-11-09 05:39:52,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631676634] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:39:52,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974280064] [2024-11-09 05:39:52,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:39:52,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:39:52,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:39:52,939 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:39:52,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-09 05:39:54,830 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-09 05:39:54,831 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:39:54,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-11-09 05:39:54,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:39:55,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:39:55,229 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:39:55,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:39:56,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:39:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 0 proven. 865 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:56,546 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:39:58,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:39:58,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-09 05:39:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 0 proven. 865 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:39:59,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974280064] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:39:59,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1390868495] [2024-11-09 05:39:59,433 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:39:59,433 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:39:59,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:39:59,434 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:39:59,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:39:59,666 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:40:02,357 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30906#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:40:02,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:40:02,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:40:02,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 85 [2024-11-09 05:40:02,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983332226] [2024-11-09 05:40:02,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:40:02,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-09 05:40:02,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:40:02,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-09 05:40:02,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=8256, Unknown=0, NotChecked=0, Total=8556 [2024-11-09 05:40:02,360 INFO L87 Difference]: Start difference. First operand 135 states and 142 transitions. Second operand has 86 states, 86 states have (on average 3.4186046511627906) internal successors, (294), 85 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:40:06,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:40:06,462 INFO L93 Difference]: Finished difference Result 197 states and 204 transitions. [2024-11-09 05:40:06,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 05:40:06,463 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.4186046511627906) internal successors, (294), 85 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2024-11-09 05:40:06,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:40:06,464 INFO L225 Difference]: With dead ends: 197 [2024-11-09 05:40:06,464 INFO L226 Difference]: Without dead ends: 195 [2024-11-09 05:40:06,464 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 274 SyntacticMatches, 16 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3077 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=462, Invalid=11310, Unknown=0, NotChecked=0, Total=11772 [2024-11-09 05:40:06,465 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 148 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 5424 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 5426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:40:06,465 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 952 Invalid, 5426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5424 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-09 05:40:06,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-09 05:40:06,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 134. [2024-11-09 05:40:06,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0601503759398496) internal successors, (141), 133 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:40:06,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 141 transitions. [2024-11-09 05:40:06,530 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 141 transitions. Word has length 116 [2024-11-09 05:40:06,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:40:06,531 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 141 transitions. [2024-11-09 05:40:06,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.4186046511627906) internal successors, (294), 85 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:40:06,531 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 141 transitions. [2024-11-09 05:40:06,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-09 05:40:06,532 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:40:06,532 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2024-11-09 05:40:06,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-09 05:40:06,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-09 05:40:06,733 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:40:06,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:40:06,733 INFO L85 PathProgramCache]: Analyzing trace with hash -91709718, now seen corresponding path program 39 times [2024-11-09 05:40:06,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:40:06,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835661383] [2024-11-09 05:40:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:40:06,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:40:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:40:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 408 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:40:07,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:40:07,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835661383] [2024-11-09 05:40:07,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835661383] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:40:07,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645941166] [2024-11-09 05:40:07,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:40:07,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:40:07,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:40:07,634 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:40:07,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-09 05:40:08,580 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:40:08,580 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:40:08,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 05:40:08,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:40:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 465 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:40:09,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:40:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 465 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:40:10,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645941166] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:40:10,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [593610432] [2024-11-09 05:40:10,319 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:40:10,319 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:40:10,320 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:40:10,320 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:40:10,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:40:10,495 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:40:12,038 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32118#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:40:12,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:40:12,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:40:12,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 52 [2024-11-09 05:40:12,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856897823] [2024-11-09 05:40:12,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:40:12,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-09 05:40:12,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:40:12,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-09 05:40:12,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=2859, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 05:40:12,041 INFO L87 Difference]: Start difference. First operand 134 states and 141 transitions. Second operand has 53 states, 53 states have (on average 3.547169811320755) internal successors, (188), 52 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:40:12,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:40:12,613 INFO L93 Difference]: Finished difference Result 202 states and 209 transitions. [2024-11-09 05:40:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 05:40:12,614 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.547169811320755) internal successors, (188), 52 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2024-11-09 05:40:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:40:12,615 INFO L225 Difference]: With dead ends: 202 [2024-11-09 05:40:12,615 INFO L226 Difference]: Without dead ends: 134 [2024-11-09 05:40:12,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 278 SyntacticMatches, 47 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3021 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=681, Invalid=2859, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 05:40:12,617 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:40:12,617 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 210 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:40:12,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-09 05:40:12,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2024-11-09 05:40:12,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0526315789473684) internal successors, (140), 133 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:40:12,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 140 transitions. [2024-11-09 05:40:12,757 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 140 transitions. Word has length 117 [2024-11-09 05:40:12,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:40:12,758 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 140 transitions. [2024-11-09 05:40:12,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.547169811320755) internal successors, (188), 52 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:40:12,758 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 140 transitions. [2024-11-09 05:40:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-11-09 05:40:12,759 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:40:12,759 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2024-11-09 05:40:12,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-11-09 05:40:12,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-09 05:40:12,960 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:40:12,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:40:12,961 INFO L85 PathProgramCache]: Analyzing trace with hash -840365225, now seen corresponding path program 40 times [2024-11-09 05:40:12,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:40:12,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30543351] [2024-11-09 05:40:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:40:12,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:40:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:40:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:40:15,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:40:15,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30543351] [2024-11-09 05:40:15,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30543351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:40:15,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663483032] [2024-11-09 05:40:15,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:40:15,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:40:15,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:40:15,288 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:40:15,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-09 05:40:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:40:15,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-09 05:40:15,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:40:16,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:40:18,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:40:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:40:18,825 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:40:20,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:40:20,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:40:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:40:22,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663483032] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:40:22,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448200177] [2024-11-09 05:40:22,171 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:40:22,171 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:40:22,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:40:22,172 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:40:22,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:40:22,377 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:40:25,690 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33376#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:40:25,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:40:25,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:40:25,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 105 [2024-11-09 05:40:25,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709273843] [2024-11-09 05:40:25,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:40:25,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-11-09 05:40:25,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:40:25,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-11-09 05:40:25,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=12265, Unknown=0, NotChecked=0, Total=12656 [2024-11-09 05:40:25,693 INFO L87 Difference]: Start difference. First operand 134 states and 140 transitions. Second operand has 106 states, 106 states have (on average 3.3679245283018866) internal successors, (357), 105 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:40:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:40:29,040 INFO L93 Difference]: Finished difference Result 207 states and 213 transitions. [2024-11-09 05:40:29,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 05:40:29,041 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.3679245283018866) internal successors, (357), 105 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2024-11-09 05:40:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:40:29,043 INFO L225 Difference]: With dead ends: 207 [2024-11-09 05:40:29,043 INFO L226 Difference]: Without dead ends: 205 [2024-11-09 05:40:29,044 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 267 SyntacticMatches, 16 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4133 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=406, Invalid=12704, Unknown=0, NotChecked=0, Total=13110 [2024-11-09 05:40:29,044 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 6742 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 6742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:40:29,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1445 Invalid, 6742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6742 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-09 05:40:29,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-09 05:40:29,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 139. [2024-11-09 05:40:29,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0507246376811594) internal successors, (145), 138 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:40:29,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 145 transitions. [2024-11-09 05:40:29,136 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 145 transitions. Word has length 120 [2024-11-09 05:40:29,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:40:29,136 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 145 transitions. [2024-11-09 05:40:29,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.3679245283018866) internal successors, (357), 105 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:40:29,137 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 145 transitions. [2024-11-09 05:40:29,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 05:40:29,137 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:40:29,137 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 18, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2024-11-09 05:40:29,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-11-09 05:40:29,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-09 05:40:29,338 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:40:29,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:40:29,338 INFO L85 PathProgramCache]: Analyzing trace with hash -271406134, now seen corresponding path program 41 times [2024-11-09 05:40:29,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:40:29,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337440420] [2024-11-09 05:40:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:40:29,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:40:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:40:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 0 proven. 978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:40:31,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:40:31,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337440420] [2024-11-09 05:40:31,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337440420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:40:31,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359705357] [2024-11-09 05:40:31,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:40:31,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:40:31,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:40:31,854 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:40:31,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-09 05:40:33,850 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2024-11-09 05:40:33,850 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:40:33,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-09 05:40:33,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:40:34,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:40:34,256 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:40:34,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:40:35,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:40:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 0 proven. 978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:40:35,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:40:37,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:40:37,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-09 05:40:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 0 proven. 978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:40:38,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359705357] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:40:38,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1969660550] [2024-11-09 05:40:38,758 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:40:38,758 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:40:38,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:40:38,758 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:40:38,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:40:38,925 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:40:42,311 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34652#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:40:42,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:40:42,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:40:42,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 90 [2024-11-09 05:40:42,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342110992] [2024-11-09 05:40:42,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:40:42,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-09 05:40:42,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:40:42,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-09 05:40:42,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=9190, Unknown=0, NotChecked=0, Total=9506 [2024-11-09 05:40:42,314 INFO L87 Difference]: Start difference. First operand 139 states and 145 transitions. Second operand has 91 states, 91 states have (on average 3.4285714285714284) internal successors, (312), 90 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:40:47,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:40:47,098 INFO L93 Difference]: Finished difference Result 205 states and 211 transitions. [2024-11-09 05:40:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 05:40:47,099 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.4285714285714284) internal successors, (312), 90 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2024-11-09 05:40:47,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:40:47,100 INFO L225 Difference]: With dead ends: 205 [2024-11-09 05:40:47,100 INFO L226 Difference]: Without dead ends: 203 [2024-11-09 05:40:47,101 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 291 SyntacticMatches, 17 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3420 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=488, Invalid=12622, Unknown=0, NotChecked=0, Total=13110 [2024-11-09 05:40:47,102 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 148 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 5761 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 5763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:40:47,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 970 Invalid, 5763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5761 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-09 05:40:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-09 05:40:47,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 138. [2024-11-09 05:40:47,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.051094890510949) internal successors, (144), 137 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:40:47,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 144 transitions. [2024-11-09 05:40:47,187 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 144 transitions. Word has length 123 [2024-11-09 05:40:47,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:40:47,188 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 144 transitions. [2024-11-09 05:40:47,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.4285714285714284) internal successors, (312), 90 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:40:47,188 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 144 transitions. [2024-11-09 05:40:47,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-09 05:40:47,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:40:47,189 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2024-11-09 05:40:47,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-09 05:40:47,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-09 05:40:47,390 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:40:47,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:40:47,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1510969918, now seen corresponding path program 42 times [2024-11-09 05:40:47,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:40:47,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396603263] [2024-11-09 05:40:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:40:47,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:40:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:40:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 467 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:40:48,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:40:48,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396603263] [2024-11-09 05:40:48,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396603263] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:40:48,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255005794] [2024-11-09 05:40:48,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:40:48,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:40:48,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:40:48,274 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:40:48,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-09 05:40:50,081 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:40:50,081 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:40:50,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-09 05:40:50,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:40:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 528 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:40:51,023 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:40:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 528 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:40:51,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255005794] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:40:51,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1899810022] [2024-11-09 05:40:51,619 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:40:51,619 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:40:51,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:40:51,619 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:40:51,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:40:51,761 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:40:52,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35926#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:40:52,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:40:52,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:40:52,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 55 [2024-11-09 05:40:52,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814934102] [2024-11-09 05:40:52,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:40:52,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-09 05:40:52,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:40:52,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-09 05:40:52,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=3151, Unknown=0, NotChecked=0, Total=3906 [2024-11-09 05:40:52,276 INFO L87 Difference]: Start difference. First operand 138 states and 144 transitions. Second operand has 56 states, 56 states have (on average 3.5535714285714284) internal successors, (199), 55 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:40:52,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:40:52,756 INFO L93 Difference]: Finished difference Result 210 states and 216 transitions. [2024-11-09 05:40:52,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 05:40:52,757 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.5535714285714284) internal successors, (199), 55 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2024-11-09 05:40:52,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:40:52,758 INFO L225 Difference]: With dead ends: 210 [2024-11-09 05:40:52,758 INFO L226 Difference]: Without dead ends: 138 [2024-11-09 05:40:52,758 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 311 SyntacticMatches, 34 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2418 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=755, Invalid=3151, Unknown=0, NotChecked=0, Total=3906 [2024-11-09 05:40:52,759 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:40:52,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 148 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:40:52,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-09 05:40:52,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2024-11-09 05:40:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0437956204379562) internal successors, (143), 137 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:40:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2024-11-09 05:40:52,821 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 124 [2024-11-09 05:40:52,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:40:52,821 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2024-11-09 05:40:52,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.5535714285714284) internal successors, (199), 55 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:40:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2024-11-09 05:40:52,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-09 05:40:52,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:40:52,822 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 18, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2024-11-09 05:40:52,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-11-09 05:40:53,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:40:53,022 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:40:53,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:40:53,023 INFO L85 PathProgramCache]: Analyzing trace with hash 880656689, now seen corresponding path program 43 times [2024-11-09 05:40:53,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:40:53,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36448045] [2024-11-09 05:40:53,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:40:53,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:40:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:40:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 0 proven. 1041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:40:55,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:40:55,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36448045] [2024-11-09 05:40:55,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36448045] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:40:55,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331431915] [2024-11-09 05:40:55,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:40:55,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:40:55,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:40:55,204 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:40:55,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-09 05:40:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:40:55,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-09 05:40:55,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:40:57,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:40:58,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:40:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 0 proven. 1041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:40:58,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:41:00,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:41:00,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:41:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 0 proven. 1041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:41:02,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331431915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:41:02,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [521767909] [2024-11-09 05:41:02,038 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:41:02,038 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:41:02,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:41:02,039 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:41:02,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:41:02,299 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:41:06,581 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37247#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:41:06,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:41:06,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:41:06,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 111 [2024-11-09 05:41:06,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072459710] [2024-11-09 05:41:06,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:41:06,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2024-11-09 05:41:06,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:41:06,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2024-11-09 05:41:06,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=13630, Unknown=0, NotChecked=0, Total=14042 [2024-11-09 05:41:06,584 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand has 112 states, 112 states have (on average 3.375) internal successors, (378), 111 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:41:10,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:41:10,991 INFO L93 Difference]: Finished difference Result 215 states and 220 transitions. [2024-11-09 05:41:10,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 05:41:10,992 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.375) internal successors, (378), 111 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2024-11-09 05:41:10,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:41:10,993 INFO L225 Difference]: With dead ends: 215 [2024-11-09 05:41:10,993 INFO L226 Difference]: Without dead ends: 213 [2024-11-09 05:41:10,994 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 283 SyntacticMatches, 17 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4591 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=427, Invalid=14093, Unknown=0, NotChecked=0, Total=14520 [2024-11-09 05:41:10,994 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 7151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 7151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:41:10,994 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1521 Invalid, 7151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7151 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-09 05:41:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-09 05:41:11,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 143. [2024-11-09 05:41:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0422535211267605) internal successors, (148), 142 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:41:11,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 148 transitions. [2024-11-09 05:41:11,086 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 148 transitions. Word has length 127 [2024-11-09 05:41:11,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:41:11,086 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 148 transitions. [2024-11-09 05:41:11,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.375) internal successors, (378), 111 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:41:11,087 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 148 transitions. [2024-11-09 05:41:11,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-09 05:41:11,087 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:41:11,087 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 19, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2024-11-09 05:41:11,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-09 05:41:11,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-09 05:41:11,288 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:41:11,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:41:11,289 INFO L85 PathProgramCache]: Analyzing trace with hash 816269662, now seen corresponding path program 44 times [2024-11-09 05:41:11,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:41:11,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930103807] [2024-11-09 05:41:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:41:11,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:41:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:41:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1098 backedges. 0 proven. 1098 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:41:13,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:41:13,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930103807] [2024-11-09 05:41:13,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930103807] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:41:13,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098922028] [2024-11-09 05:41:13,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:41:13,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:41:13,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:41:13,422 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:41:13,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-09 05:41:15,546 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-09 05:41:15,547 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:41:15,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-11-09 05:41:15,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:41:16,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:41:16,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 05:41:16,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-09 05:41:18,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:41:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1098 backedges. 0 proven. 1098 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:41:18,403 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:41:20,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:41:20,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-09 05:41:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1098 backedges. 0 proven. 1098 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:41:22,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098922028] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:41:22,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [204747976] [2024-11-09 05:41:22,402 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:41:22,402 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:41:22,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:41:22,403 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:41:22,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:41:22,612 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:41:26,858 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38606#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:41:26,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:41:26,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:41:26,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 116 [2024-11-09 05:41:26,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141921569] [2024-11-09 05:41:26,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:41:26,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-11-09 05:41:26,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:41:26,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-11-09 05:41:26,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=14811, Unknown=0, NotChecked=0, Total=15252 [2024-11-09 05:41:26,862 INFO L87 Difference]: Start difference. First operand 143 states and 148 transitions. Second operand has 117 states, 117 states have (on average 3.3076923076923075) internal successors, (387), 116 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:41:32,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:41:32,899 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2024-11-09 05:41:32,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-09 05:41:32,900 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.3076923076923075) internal successors, (387), 116 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2024-11-09 05:41:32,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:41:32,901 INFO L225 Difference]: With dead ends: 213 [2024-11-09 05:41:32,902 INFO L226 Difference]: Without dead ends: 211 [2024-11-09 05:41:32,903 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 288 SyntacticMatches, 17 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6134 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=662, Invalid=19930, Unknown=0, NotChecked=0, Total=20592 [2024-11-09 05:41:32,904 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 93 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 7985 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 7986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:41:32,905 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 1245 Invalid, 7986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7985 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-09 05:41:32,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-09 05:41:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 142. [2024-11-09 05:41:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0425531914893618) internal successors, (147), 141 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:41:33,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 147 transitions. [2024-11-09 05:41:33,013 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 147 transitions. Word has length 130 [2024-11-09 05:41:33,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:41:33,013 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 147 transitions. [2024-11-09 05:41:33,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.3076923076923075) internal successors, (387), 116 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:41:33,014 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 147 transitions. [2024-11-09 05:41:33,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-09 05:41:33,015 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:41:33,015 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2024-11-09 05:41:33,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-11-09 05:41:33,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:41:33,216 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:41:33,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:41:33,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1497484056, now seen corresponding path program 45 times [2024-11-09 05:41:33,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:41:33,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437086544] [2024-11-09 05:41:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:41:33,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:41:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:41:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 530 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:41:34,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:41:34,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437086544] [2024-11-09 05:41:34,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437086544] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:41:34,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538450890] [2024-11-09 05:41:34,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:41:34,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:41:34,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:41:34,713 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:41:34,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-09 05:41:36,383 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:41:36,383 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:41:36,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 05:41:36,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:41:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 595 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:41:37,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:41:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 595 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:41:38,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538450890] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:41:38,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [364893049] [2024-11-09 05:41:38,125 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:41:38,125 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:41:38,125 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:41:38,126 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:41:38,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:41:38,266 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:41:39,798 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39946#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:41:39,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:41:39,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:41:39,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2024-11-09 05:41:39,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042713747] [2024-11-09 05:41:39,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:41:39,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-09 05:41:39,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:41:39,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-09 05:41:39,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=833, Invalid=3457, Unknown=0, NotChecked=0, Total=4290 [2024-11-09 05:41:39,802 INFO L87 Difference]: Start difference. First operand 142 states and 147 transitions. Second operand has 59 states, 59 states have (on average 3.559322033898305) internal successors, (210), 58 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:41:40,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:41:40,300 INFO L93 Difference]: Finished difference Result 218 states and 223 transitions. [2024-11-09 05:41:40,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 05:41:40,300 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.559322033898305) internal successors, (210), 58 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2024-11-09 05:41:40,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:41:40,301 INFO L225 Difference]: With dead ends: 218 [2024-11-09 05:41:40,301 INFO L226 Difference]: Without dead ends: 142 [2024-11-09 05:41:40,302 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 312 SyntacticMatches, 53 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3721 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=833, Invalid=3457, Unknown=0, NotChecked=0, Total=4290 [2024-11-09 05:41:40,302 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:41:40,302 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 188 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:41:40,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-09 05:41:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2024-11-09 05:41:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0354609929078014) internal successors, (146), 141 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:41:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2024-11-09 05:41:40,366 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 131 [2024-11-09 05:41:40,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:41:40,367 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2024-11-09 05:41:40,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.559322033898305) internal successors, (210), 58 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:41:40,367 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2024-11-09 05:41:40,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 05:41:40,368 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:41:40,368 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 19, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2024-11-09 05:41:40,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-11-09 05:41:40,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:41:40,568 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:41:40,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:41:40,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1746832187, now seen corresponding path program 46 times [2024-11-09 05:41:40,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:41:40,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933223443] [2024-11-09 05:41:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:41:40,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:41:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:41:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:41:42,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:41:42,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933223443] [2024-11-09 05:41:42,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933223443] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:41:42,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903512313] [2024-11-09 05:41:42,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:41:42,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:41:42,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:41:42,271 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:41:42,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-09 05:41:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:41:42,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-09 05:41:42,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:41:43,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:41:45,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:41:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:41:46,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:41:48,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:41:48,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:41:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:41:50,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903512313] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:41:50,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [996746144] [2024-11-09 05:41:50,193 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:41:50,193 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:41:50,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:41:50,193 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:41:50,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:41:50,384 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:41:55,095 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41330#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:41:55,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:41:55,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:41:55,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 117 [2024-11-09 05:41:55,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992339666] [2024-11-09 05:41:55,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:41:55,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2024-11-09 05:41:55,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:41:55,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2024-11-09 05:41:55,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=15067, Unknown=0, NotChecked=0, Total=15500 [2024-11-09 05:41:55,098 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand has 118 states, 118 states have (on average 3.3813559322033897) internal successors, (399), 117 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:00,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:00,251 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2024-11-09 05:42:00,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-09 05:42:00,252 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.3813559322033897) internal successors, (399), 117 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2024-11-09 05:42:00,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:00,253 INFO L225 Difference]: With dead ends: 223 [2024-11-09 05:42:00,253 INFO L226 Difference]: Without dead ends: 221 [2024-11-09 05:42:00,254 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 298 SyntacticMatches, 19 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5111 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=448, Invalid=15554, Unknown=0, NotChecked=0, Total=16002 [2024-11-09 05:42:00,254 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 8270 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 8270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:00,255 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1748 Invalid, 8270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8270 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-09 05:42:00,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-09 05:42:00,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 147. [2024-11-09 05:42:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0342465753424657) internal successors, (151), 146 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2024-11-09 05:42:00,369 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 134 [2024-11-09 05:42:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:00,369 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2024-11-09 05:42:00,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.3813559322033897) internal successors, (399), 117 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:00,369 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2024-11-09 05:42:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-09 05:42:00,370 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:00,370 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 20, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2024-11-09 05:42:00,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-11-09 05:42:00,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-09 05:42:00,570 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:42:00,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:00,571 INFO L85 PathProgramCache]: Analyzing trace with hash 772001784, now seen corresponding path program 47 times [2024-11-09 05:42:00,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:00,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182377598] [2024-11-09 05:42:00,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:00,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:03,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:03,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182377598] [2024-11-09 05:42:03,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182377598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:42:03,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340113316] [2024-11-09 05:42:03,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:42:03,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:42:03,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:42:03,030 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:42:03,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-09 05:42:04,902 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2024-11-09 05:42:04,902 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:42:04,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-09 05:42:04,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:42:05,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:42:05,204 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:42:05,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:42:06,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:42:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:06,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:42:07,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:42:07,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-09 05:42:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:09,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340113316] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:42:09,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [456053301] [2024-11-09 05:42:09,579 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:42:09,580 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:42:09,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:42:09,580 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:42:09,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:42:09,809 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:42:13,873 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42730#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:42:13,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:42:13,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:42:13,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 100 [2024-11-09 05:42:13,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039804025] [2024-11-09 05:42:13,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:42:13,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-09 05:42:13,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:13,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-09 05:42:13,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=11208, Unknown=0, NotChecked=0, Total=11556 [2024-11-09 05:42:13,876 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand has 101 states, 101 states have (on average 3.4455445544554455) internal successors, (348), 100 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:19,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:19,588 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2024-11-09 05:42:19,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-09 05:42:19,589 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.4455445544554455) internal successors, (348), 100 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2024-11-09 05:42:19,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:19,590 INFO L225 Difference]: With dead ends: 221 [2024-11-09 05:42:19,590 INFO L226 Difference]: Without dead ends: 219 [2024-11-09 05:42:19,592 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 325 SyntacticMatches, 19 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4160 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=540, Invalid=15462, Unknown=0, NotChecked=0, Total=16002 [2024-11-09 05:42:19,592 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 164 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 7252 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 7254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:19,593 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1230 Invalid, 7254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7252 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-09 05:42:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-09 05:42:19,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 146. [2024-11-09 05:42:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 145 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:19,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2024-11-09 05:42:19,721 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 137 [2024-11-09 05:42:19,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:19,721 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2024-11-09 05:42:19,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.4455445544554455) internal successors, (348), 100 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:19,721 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2024-11-09 05:42:19,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 05:42:19,722 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:19,722 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2024-11-09 05:42:19,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-11-09 05:42:19,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:42:19,923 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:42:19,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:19,923 INFO L85 PathProgramCache]: Analyzing trace with hash 901354668, now seen corresponding path program 48 times [2024-11-09 05:42:19,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:19,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859814170] [2024-11-09 05:42:19,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:19,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 597 proven. 639 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:21,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:21,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859814170] [2024-11-09 05:42:21,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859814170] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:42:21,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020267797] [2024-11-09 05:42:21,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:42:21,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:42:21,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:42:21,118 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:42:21,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-09 05:42:22,311 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:42:22,311 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:42:22,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-09 05:42:22,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:42:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 666 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:23,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:42:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 666 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:24,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020267797] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:42:24,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [756032553] [2024-11-09 05:42:24,574 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:42:24,575 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:42:24,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:42:24,575 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:42:24,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:42:24,885 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:42:26,962 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '44128#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:42:26,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:42:26,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:42:26,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 61 [2024-11-09 05:42:26,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847655057] [2024-11-09 05:42:26,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:42:26,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-09 05:42:26,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:26,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-09 05:42:26,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=3777, Unknown=0, NotChecked=0, Total=4692 [2024-11-09 05:42:26,965 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 62 states, 62 states have (on average 3.564516129032258) internal successors, (221), 61 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:27,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:27,659 INFO L93 Difference]: Finished difference Result 226 states and 230 transitions. [2024-11-09 05:42:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-09 05:42:27,659 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.564516129032258) internal successors, (221), 61 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2024-11-09 05:42:27,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:27,660 INFO L225 Difference]: With dead ends: 226 [2024-11-09 05:42:27,660 INFO L226 Difference]: Without dead ends: 146 [2024-11-09 05:42:27,661 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 329 SyntacticMatches, 56 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=915, Invalid=3777, Unknown=0, NotChecked=0, Total=4692 [2024-11-09 05:42:27,661 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:27,661 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 258 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:42:27,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-09 05:42:27,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2024-11-09 05:42:27,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0275862068965518) internal successors, (149), 145 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:27,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2024-11-09 05:42:27,731 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 138 [2024-11-09 05:42:27,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:27,731 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2024-11-09 05:42:27,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.564516129032258) internal successors, (221), 61 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2024-11-09 05:42:27,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-09 05:42:27,737 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:27,737 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 20, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2024-11-09 05:42:27,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-11-09 05:42:27,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-09 05:42:27,938 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:42:27,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:27,938 INFO L85 PathProgramCache]: Analyzing trace with hash -268100001, now seen corresponding path program 49 times [2024-11-09 05:42:27,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:27,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364580323] [2024-11-09 05:42:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:27,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:30,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:30,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364580323] [2024-11-09 05:42:30,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364580323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:42:30,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949061955] [2024-11-09 05:42:30,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:42:30,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:42:30,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:42:30,159 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:42:30,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-09 05:42:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:30,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-09 05:42:30,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:42:32,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:42:34,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:42:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:34,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:42:36,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:42:36,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:42:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:38,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949061955] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:42:38,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [703397303] [2024-11-09 05:42:38,880 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:42:38,881 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:42:38,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:42:38,881 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:42:38,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:42:39,011 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:42:42,959 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45575#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:42:42,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:42:42,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:42:42,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 123 [2024-11-09 05:42:42,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276698702] [2024-11-09 05:42:42,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:42:42,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2024-11-09 05:42:42,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:42:42,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2024-11-09 05:42:42,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=16576, Unknown=0, NotChecked=0, Total=17030 [2024-11-09 05:42:42,962 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand has 124 states, 124 states have (on average 3.3870967741935485) internal successors, (420), 123 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:48,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:42:48,019 INFO L93 Difference]: Finished difference Result 231 states and 234 transitions. [2024-11-09 05:42:48,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-09 05:42:48,020 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 3.3870967741935485) internal successors, (420), 123 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2024-11-09 05:42:48,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:42:48,021 INFO L225 Difference]: With dead ends: 231 [2024-11-09 05:42:48,021 INFO L226 Difference]: Without dead ends: 229 [2024-11-09 05:42:48,022 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 314 SyntacticMatches, 20 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5619 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=469, Invalid=17087, Unknown=0, NotChecked=0, Total=17556 [2024-11-09 05:42:48,022 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 7905 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 7905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:42:48,022 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1608 Invalid, 7905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7905 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-09 05:42:48,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-09 05:42:48,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 151. [2024-11-09 05:42:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:48,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2024-11-09 05:42:48,131 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 141 [2024-11-09 05:42:48,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:42:48,131 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2024-11-09 05:42:48,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 3.3870967741935485) internal successors, (420), 123 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:42:48,131 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2024-11-09 05:42:48,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-09 05:42:48,132 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:42:48,132 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 21, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2024-11-09 05:42:48,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-09 05:42:48,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:42:48,333 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:42:48,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:42:48,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1282560972, now seen corresponding path program 50 times [2024-11-09 05:42:48,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:42:48,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174486157] [2024-11-09 05:42:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:42:48,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:42:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:42:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1359 backedges. 0 proven. 1359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:50,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:42:50,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174486157] [2024-11-09 05:42:50,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174486157] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:42:50,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968997295] [2024-11-09 05:42:50,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:42:50,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:42:50,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:42:50,904 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:42:50,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-09 05:42:55,813 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-11-09 05:42:55,813 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:42:55,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-11-09 05:42:55,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:42:56,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:42:56,239 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:42:56,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:42:57,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:42:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1359 backedges. 0 proven. 1359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:42:58,013 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:00,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:43:00,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-09 05:43:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1359 backedges. 0 proven. 1359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:43:02,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968997295] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:02,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [529339395] [2024-11-09 05:43:02,204 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:43:02,204 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:02,204 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:02,204 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:02,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:02,447 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:06,003 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47037#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:43:06,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:06,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:06,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 105 [2024-11-09 05:43:06,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567815069] [2024-11-09 05:43:06,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:06,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-11-09 05:43:06,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:06,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-11-09 05:43:06,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=12292, Unknown=0, NotChecked=0, Total=12656 [2024-11-09 05:43:06,006 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 106 states, 106 states have (on average 3.452830188679245) internal successors, (366), 105 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:11,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:11,870 INFO L93 Difference]: Finished difference Result 229 states and 232 transitions. [2024-11-09 05:43:11,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-09 05:43:11,871 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.452830188679245) internal successors, (366), 105 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2024-11-09 05:43:11,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:11,872 INFO L225 Difference]: With dead ends: 229 [2024-11-09 05:43:11,872 INFO L226 Difference]: Without dead ends: 227 [2024-11-09 05:43:11,873 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 342 SyntacticMatches, 20 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4557 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=566, Invalid=16990, Unknown=0, NotChecked=0, Total=17556 [2024-11-09 05:43:11,873 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 269 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 8420 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 8423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:11,873 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 1430 Invalid, 8423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8420 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-09 05:43:11,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-11-09 05:43:12,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 150. [2024-11-09 05:43:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 149 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2024-11-09 05:43:12,042 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 144 [2024-11-09 05:43:12,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:12,042 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2024-11-09 05:43:12,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.452830188679245) internal successors, (366), 105 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2024-11-09 05:43:12,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-09 05:43:12,044 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:12,044 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2024-11-09 05:43:12,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-09 05:43:12,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:12,244 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:12,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:12,245 INFO L85 PathProgramCache]: Analyzing trace with hash 442163526, now seen corresponding path program 51 times [2024-11-09 05:43:12,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:12,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374558200] [2024-11-09 05:43:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:12,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 668 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:43:13,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:13,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374558200] [2024-11-09 05:43:13,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374558200] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:13,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641332867] [2024-11-09 05:43:13,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:43:13,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:13,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:13,618 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:13,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-09 05:43:15,431 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:43:15,431 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:43:15,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 05:43:15,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 741 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:43:16,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 741 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:43:17,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641332867] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:17,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1969846302] [2024-11-09 05:43:17,263 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:43:17,263 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:17,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:17,263 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:17,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:17,408 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:18,988 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48497#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:43:18,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:18,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:18,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 64 [2024-11-09 05:43:18,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842423946] [2024-11-09 05:43:18,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:18,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-09 05:43:18,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:18,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-09 05:43:18,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1001, Invalid=4111, Unknown=0, NotChecked=0, Total=5112 [2024-11-09 05:43:18,990 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 65 states, 65 states have (on average 3.5692307692307694) internal successors, (232), 64 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:19,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:19,559 INFO L93 Difference]: Finished difference Result 234 states and 237 transitions. [2024-11-09 05:43:19,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-09 05:43:19,560 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.5692307692307694) internal successors, (232), 64 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2024-11-09 05:43:19,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:19,561 INFO L225 Difference]: With dead ends: 234 [2024-11-09 05:43:19,561 INFO L226 Difference]: Without dead ends: 150 [2024-11-09 05:43:19,561 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 346 SyntacticMatches, 59 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4493 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1001, Invalid=4111, Unknown=0, NotChecked=0, Total=5112 [2024-11-09 05:43:19,562 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:19,562 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 207 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:43:19,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-09 05:43:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-11-09 05:43:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:19,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2024-11-09 05:43:19,651 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 145 [2024-11-09 05:43:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:19,651 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2024-11-09 05:43:19,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.5692307692307694) internal successors, (232), 64 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2024-11-09 05:43:19,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-09 05:43:19,652 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:19,652 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 21, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2024-11-09 05:43:19,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-09 05:43:19,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:19,853 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:19,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:19,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1764071475, now seen corresponding path program 52 times [2024-11-09 05:43:19,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:19,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747723756] [2024-11-09 05:43:19,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:19,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1434 backedges. 0 proven. 1434 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:43:22,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:22,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747723756] [2024-11-09 05:43:22,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747723756] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:22,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251037561] [2024-11-09 05:43:22,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:43:22,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:22,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:22,393 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:22,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-09 05:43:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:22,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-09 05:43:22,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:24,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:43:27,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:43:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1434 backedges. 0 proven. 1434 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:43:27,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:29,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:43:29,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:43:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1434 backedges. 0 proven. 1434 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:43:32,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251037561] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:32,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [228936126] [2024-11-09 05:43:32,213 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:43:32,213 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:32,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:32,213 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:32,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:32,426 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:34,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50007#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:43:34,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:34,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:34,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 129 [2024-11-09 05:43:34,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298597980] [2024-11-09 05:43:34,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:34,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2024-11-09 05:43:34,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:34,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2024-11-09 05:43:34,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=18157, Unknown=0, NotChecked=0, Total=18632 [2024-11-09 05:43:34,017 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand has 130 states, 130 states have (on average 3.3923076923076922) internal successors, (441), 129 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:39,347 INFO L93 Difference]: Finished difference Result 241 states and 244 transitions. [2024-11-09 05:43:39,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-09 05:43:39,347 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 3.3923076923076922) internal successors, (441), 129 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2024-11-09 05:43:39,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:39,348 INFO L225 Difference]: With dead ends: 241 [2024-11-09 05:43:39,348 INFO L226 Difference]: Without dead ends: 239 [2024-11-09 05:43:39,349 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 350 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4399 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=490, Invalid=18692, Unknown=0, NotChecked=0, Total=19182 [2024-11-09 05:43:39,349 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 9293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1916 SdHoareTripleChecker+Invalid, 9293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:39,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1916 Invalid, 9293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9293 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-09 05:43:39,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-09 05:43:39,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 157. [2024-11-09 05:43:39,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2024-11-09 05:43:39,447 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 148 [2024-11-09 05:43:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:39,447 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2024-11-09 05:43:39,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 3.3923076923076922) internal successors, (441), 129 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2024-11-09 05:43:39,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-09 05:43:39,448 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:39,448 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2024-11-09 05:43:39,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2024-11-09 05:43:39,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:39,652 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:39,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:39,652 INFO L85 PathProgramCache]: Analyzing trace with hash -6470435, now seen corresponding path program 3 times [2024-11-09 05:43:39,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:39,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962472529] [2024-11-09 05:43:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:39,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2024-11-09 05:43:40,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:40,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962472529] [2024-11-09 05:43:40,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962472529] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:40,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074450467] [2024-11-09 05:43:40,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:43:40,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:40,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:40,190 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:40,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-09 05:43:42,464 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:43:42,464 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:43:42,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:43:42,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2024-11-09 05:43:43,082 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2024-11-09 05:43:43,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074450467] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:43:43,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1423669919] [2024-11-09 05:43:43,982 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:43:43,982 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:43:43,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:43:43,983 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:43:43,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:43:44,137 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:43:44,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '51483#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:43:44,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:43:44,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:43:44,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2024-11-09 05:43:44,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208976852] [2024-11-09 05:43:44,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:43:44,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-09 05:43:44,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:44,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-09 05:43:44,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=3724, Unknown=0, NotChecked=0, Total=6006 [2024-11-09 05:43:44,960 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:47,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:47,981 INFO L93 Difference]: Finished difference Result 2358 states and 2408 transitions. [2024-11-09 05:43:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 05:43:47,981 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2024-11-09 05:43:47,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:47,986 INFO L225 Difference]: With dead ends: 2358 [2024-11-09 05:43:47,986 INFO L226 Difference]: Without dead ends: 2276 [2024-11-09 05:43:47,987 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 374 SyntacticMatches, 19 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5111 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2282, Invalid=3724, Unknown=0, NotChecked=0, Total=6006 [2024-11-09 05:43:47,987 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 664 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:47,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 178 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:43:47,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2024-11-09 05:43:48,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 227. [2024-11-09 05:43:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.1194690265486726) internal successors, (253), 226 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:48,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 253 transitions. [2024-11-09 05:43:48,188 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 253 transitions. Word has length 149 [2024-11-09 05:43:48,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:48,188 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 253 transitions. [2024-11-09 05:43:48,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:43:48,188 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 253 transitions. [2024-11-09 05:43:48,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-09 05:43:48,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:48,190 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 22, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2024-11-09 05:43:48,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-11-09 05:43:48,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-09 05:43:48,394 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:48,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:48,395 INFO L85 PathProgramCache]: Analyzing trace with hash -2126324186, now seen corresponding path program 53 times [2024-11-09 05:43:48,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:48,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489833236] [2024-11-09 05:43:48,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:48,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:43:51,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:51,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489833236] [2024-11-09 05:43:51,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489833236] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:51,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413696294] [2024-11-09 05:43:51,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:43:51,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:51,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:51,679 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:51,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-09 05:43:58,156 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-09 05:43:58,156 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:43:58,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-09 05:43:58,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:58,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:43:58,583 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:43:58,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:43:59,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:44:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:44:00,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:44:02,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:44:02,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2024-11-09 05:44:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:44:04,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413696294] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:44:04,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1334612942] [2024-11-09 05:44:04,663 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:44:04,663 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:44:04,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:44:04,663 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:44:04,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:44:04,849 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:44:06,228 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55742#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:44:06,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:44:06,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:44:06,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 110 [2024-11-09 05:44:06,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244175101] [2024-11-09 05:44:06,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:44:06,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-11-09 05:44:06,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:44:06,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-11-09 05:44:06,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=13426, Unknown=0, NotChecked=0, Total=13806 [2024-11-09 05:44:06,231 INFO L87 Difference]: Start difference. First operand 227 states and 253 transitions. Second operand has 111 states, 111 states have (on average 3.4594594594594597) internal successors, (384), 110 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:44:12,723 INFO L93 Difference]: Finished difference Result 309 states and 335 transitions. [2024-11-09 05:44:12,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-09 05:44:12,724 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 3.4594594594594597) internal successors, (384), 110 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2024-11-09 05:44:12,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:44:12,726 INFO L225 Difference]: With dead ends: 309 [2024-11-09 05:44:12,726 INFO L226 Difference]: Without dead ends: 307 [2024-11-09 05:44:12,728 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 378 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3585 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=592, Invalid=18590, Unknown=0, NotChecked=0, Total=19182 [2024-11-09 05:44:12,729 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 91 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 8396 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 8397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:44:12,729 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1387 Invalid, 8397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8396 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-09 05:44:12,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2024-11-09 05:44:12,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 226. [2024-11-09 05:44:12,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.12) internal successors, (252), 225 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:12,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 252 transitions. [2024-11-09 05:44:12,939 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 252 transitions. Word has length 151 [2024-11-09 05:44:12,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:44:12,939 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 252 transitions. [2024-11-09 05:44:12,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 3.4594594594594597) internal successors, (384), 110 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 252 transitions. [2024-11-09 05:44:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-09 05:44:12,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:12,940 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2024-11-09 05:44:12,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-11-09 05:44:13,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-11-09 05:44:13,141 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:44:13,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:13,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1203613414, now seen corresponding path program 54 times [2024-11-09 05:44:13,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:13,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15032233] [2024-11-09 05:44:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:13,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 743 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:44:14,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:44:14,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15032233] [2024-11-09 05:44:14,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15032233] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:44:14,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647718423] [2024-11-09 05:44:14,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:44:14,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:14,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:44:14,292 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:44:14,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-09 05:44:15,696 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:44:15,696 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:44:15,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 05:44:15,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:44:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 820 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:44:16,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:44:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 820 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:44:17,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647718423] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:44:17,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [7970896] [2024-11-09 05:44:17,544 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:44:17,544 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:44:17,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:44:17,545 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:44:17,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:44:17,687 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:44:19,448 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '57456#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:44:19,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:44:19,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:44:19,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 67 [2024-11-09 05:44:19,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393170514] [2024-11-09 05:44:19,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:44:19,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-09 05:44:19,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:44:19,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-09 05:44:19,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1091, Invalid=4459, Unknown=0, NotChecked=0, Total=5550 [2024-11-09 05:44:19,450 INFO L87 Difference]: Start difference. First operand 226 states and 252 transitions. Second operand has 68 states, 68 states have (on average 3.573529411764706) internal successors, (243), 67 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:44:20,224 INFO L93 Difference]: Finished difference Result 314 states and 340 transitions. [2024-11-09 05:44:20,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-09 05:44:20,224 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.573529411764706) internal successors, (243), 67 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2024-11-09 05:44:20,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:44:20,226 INFO L225 Difference]: With dead ends: 314 [2024-11-09 05:44:20,226 INFO L226 Difference]: Without dead ends: 226 [2024-11-09 05:44:20,226 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 363 SyntacticMatches, 62 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4906 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1091, Invalid=4459, Unknown=0, NotChecked=0, Total=5550 [2024-11-09 05:44:20,227 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:44:20,227 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 202 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:44:20,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-11-09 05:44:20,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2024-11-09 05:44:20,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.1155555555555556) internal successors, (251), 225 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 251 transitions. [2024-11-09 05:44:20,368 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 251 transitions. Word has length 152 [2024-11-09 05:44:20,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:44:20,369 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 251 transitions. [2024-11-09 05:44:20,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.573529411764706) internal successors, (243), 67 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:20,369 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 251 transitions. [2024-11-09 05:44:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2024-11-09 05:44:20,369 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:20,370 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 22, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2024-11-09 05:44:20,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-11-09 05:44:20,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2024-11-09 05:44:20,570 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:44:20,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:20,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1402299789, now seen corresponding path program 55 times [2024-11-09 05:44:20,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:20,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999255703] [2024-11-09 05:44:20,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:20,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 0 proven. 1579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:44:23,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:44:23,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999255703] [2024-11-09 05:44:23,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999255703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:44:23,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447025716] [2024-11-09 05:44:23,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:44:23,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:23,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:44:23,489 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:44:23,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-11-09 05:44:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:24,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-09 05:44:24,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:44:26,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:44:28,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:44:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 0 proven. 1579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:44:28,112 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:44:30,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:44:30,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:44:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 0 proven. 1579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:44:32,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447025716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:44:32,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1729123445] [2024-11-09 05:44:32,520 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:44:32,520 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:44:32,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:44:32,520 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:44:32,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:44:32,748 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:44:38,293 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59221#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:44:38,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:44:38,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:44:38,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 135 [2024-11-09 05:44:38,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243619883] [2024-11-09 05:44:38,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:44:38,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2024-11-09 05:44:38,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:44:38,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2024-11-09 05:44:38,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=19810, Unknown=0, NotChecked=0, Total=20306 [2024-11-09 05:44:38,296 INFO L87 Difference]: Start difference. First operand 226 states and 251 transitions. Second operand has 136 states, 136 states have (on average 3.3970588235294117) internal successors, (462), 135 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:44,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:44:44,608 INFO L93 Difference]: Finished difference Result 319 states and 344 transitions. [2024-11-09 05:44:44,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-09 05:44:44,608 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 3.3970588235294117) internal successors, (462), 135 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2024-11-09 05:44:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:44:44,609 INFO L225 Difference]: With dead ends: 319 [2024-11-09 05:44:44,609 INFO L226 Difference]: Without dead ends: 317 [2024-11-09 05:44:44,610 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 347 SyntacticMatches, 21 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6663 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=511, Invalid=20369, Unknown=0, NotChecked=0, Total=20880 [2024-11-09 05:44:44,611 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 2212 mSDsCounter, 0 mSdLazyCounter, 11038 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2241 SdHoareTripleChecker+Invalid, 11038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:44:44,611 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 2241 Invalid, 11038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11038 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2024-11-09 05:44:44,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2024-11-09 05:44:44,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 231. [2024-11-09 05:44:44,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.1130434782608696) internal successors, (256), 230 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 256 transitions. [2024-11-09 05:44:44,767 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 256 transitions. Word has length 155 [2024-11-09 05:44:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:44:44,768 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 256 transitions. [2024-11-09 05:44:44,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 3.3970588235294117) internal successors, (462), 135 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:44:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 256 transitions. [2024-11-09 05:44:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-11-09 05:44:44,769 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:44,769 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2024-11-09 05:44:44,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-11-09 05:44:44,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-11-09 05:44:44,970 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:44:44,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:44,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1666312134, now seen corresponding path program 56 times [2024-11-09 05:44:44,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:44,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815611204] [2024-11-09 05:44:44,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:44,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 0 proven. 1648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:44:47,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:44:47,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815611204] [2024-11-09 05:44:47,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815611204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:44:47,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597555889] [2024-11-09 05:44:47,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:44:47,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:47,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:44:47,788 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:44:47,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-11-09 05:44:54,673 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-11-09 05:44:54,673 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:44:54,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-11-09 05:44:54,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:44:55,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:44:55,104 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:44:55,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:44:57,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:44:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 0 proven. 1648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:44:57,185 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:44:59,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:44:59,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-09 05:45:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 0 proven. 1648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:45:02,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597555889] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:45:02,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [296748272] [2024-11-09 05:45:02,093 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:45:02,094 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:45:02,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:45:02,094 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:45:02,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:45:02,297 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:45:06,576 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '61001#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:45:06,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:45:06,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:45:06,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 117 [2024-11-09 05:45:06,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056393540] [2024-11-09 05:45:06,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:45:06,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2024-11-09 05:45:06,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:45:06,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2024-11-09 05:45:06,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=15091, Unknown=0, NotChecked=0, Total=15500 [2024-11-09 05:45:06,581 INFO L87 Difference]: Start difference. First operand 231 states and 256 transitions. Second operand has 118 states, 118 states have (on average 3.406779661016949) internal successors, (402), 117 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:13,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:45:13,897 INFO L93 Difference]: Finished difference Result 317 states and 342 transitions. [2024-11-09 05:45:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 05:45:13,898 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.406779661016949) internal successors, (402), 117 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2024-11-09 05:45:13,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:45:13,899 INFO L225 Difference]: With dead ends: 317 [2024-11-09 05:45:13,899 INFO L226 Difference]: Without dead ends: 315 [2024-11-09 05:45:13,900 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 375 SyntacticMatches, 21 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5646 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=645, Invalid=21111, Unknown=0, NotChecked=0, Total=21756 [2024-11-09 05:45:13,901 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 1726 mSDsCounter, 0 mSdLazyCounter, 11277 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 11278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:45:13,901 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 1749 Invalid, 11278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11277 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2024-11-09 05:45:13,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-11-09 05:45:14,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 230. [2024-11-09 05:45:14,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.1135371179039302) internal successors, (255), 229 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:14,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 255 transitions. [2024-11-09 05:45:14,030 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 255 transitions. Word has length 158 [2024-11-09 05:45:14,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:45:14,031 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 255 transitions. [2024-11-09 05:45:14,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.406779661016949) internal successors, (402), 117 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:14,031 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 255 transitions. [2024-11-09 05:45:14,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 05:45:14,032 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:45:14,032 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1] [2024-11-09 05:45:14,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-11-09 05:45:14,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-11-09 05:45:14,233 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:45:14,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:45:14,233 INFO L85 PathProgramCache]: Analyzing trace with hash 553116020, now seen corresponding path program 57 times [2024-11-09 05:45:14,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:45:14,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077236355] [2024-11-09 05:45:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:14,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:45:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 822 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:45:15,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:45:15,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077236355] [2024-11-09 05:45:15,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077236355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:45:15,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035099897] [2024-11-09 05:45:15,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:45:15,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:15,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:45:15,480 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:45:15,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-11-09 05:45:17,365 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:45:17,365 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:45:17,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-09 05:45:17,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:45:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 903 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:45:18,720 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:45:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 903 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:45:19,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035099897] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:45:19,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1468201327] [2024-11-09 05:45:19,757 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:45:19,757 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:45:19,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:45:19,758 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:45:19,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:45:19,933 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:45:21,931 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '62779#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:45:21,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:45:21,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:45:21,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 70 [2024-11-09 05:45:21,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459347931] [2024-11-09 05:45:21,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:45:21,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-09 05:45:21,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:45:21,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-09 05:45:21,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=4821, Unknown=0, NotChecked=0, Total=6006 [2024-11-09 05:45:21,934 INFO L87 Difference]: Start difference. First operand 230 states and 255 transitions. Second operand has 71 states, 71 states have (on average 3.5774647887323945) internal successors, (254), 70 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:22,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:45:22,687 INFO L93 Difference]: Finished difference Result 322 states and 347 transitions. [2024-11-09 05:45:22,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-09 05:45:22,688 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.5774647887323945) internal successors, (254), 70 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2024-11-09 05:45:22,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:45:22,689 INFO L225 Difference]: With dead ends: 322 [2024-11-09 05:45:22,689 INFO L226 Difference]: Without dead ends: 230 [2024-11-09 05:45:22,689 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 380 SyntacticMatches, 65 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5337 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1185, Invalid=4821, Unknown=0, NotChecked=0, Total=6006 [2024-11-09 05:45:22,690 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:45:22,690 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 298 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:45:22,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-11-09 05:45:22,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2024-11-09 05:45:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.1091703056768558) internal successors, (254), 229 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 254 transitions. [2024-11-09 05:45:22,901 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 254 transitions. Word has length 159 [2024-11-09 05:45:22,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:45:22,901 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 254 transitions. [2024-11-09 05:45:22,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.5774647887323945) internal successors, (254), 70 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:22,901 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 254 transitions. [2024-11-09 05:45:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-09 05:45:22,902 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:45:22,902 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 22, 22, 21, 21, 1, 1, 1, 1, 1] [2024-11-09 05:45:22,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-11-09 05:45:23,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-11-09 05:45:23,104 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:45:23,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:45:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash -202541663, now seen corresponding path program 58 times [2024-11-09 05:45:23,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:45:23,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386433936] [2024-11-09 05:45:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:23,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:45:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 0 proven. 1731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:45:26,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:45:26,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386433936] [2024-11-09 05:45:26,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386433936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:45:26,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679444772] [2024-11-09 05:45:26,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:45:26,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:26,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:45:26,042 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:45:26,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-11-09 05:45:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:26,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-09 05:45:26,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:45:28,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:45:31,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:45:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 0 proven. 1731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:45:31,588 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:45:34,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:45:34,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:45:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 0 proven. 1731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:45:36,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679444772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:45:36,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1923384293] [2024-11-09 05:45:36,855 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:45:36,855 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:45:36,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:45:36,855 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:45:36,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:45:37,054 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:45:41,941 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64607#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:45:41,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:45:41,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:45:41,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 141 [2024-11-09 05:45:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531871455] [2024-11-09 05:45:41,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:45:41,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2024-11-09 05:45:41,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:45:41,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2024-11-09 05:45:41,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=21535, Unknown=0, NotChecked=0, Total=22052 [2024-11-09 05:45:41,945 INFO L87 Difference]: Start difference. First operand 230 states and 254 transitions. Second operand has 142 states, 142 states have (on average 3.4014084507042255) internal successors, (483), 141 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:48,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:45:48,999 INFO L93 Difference]: Finished difference Result 327 states and 351 transitions. [2024-11-09 05:45:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-09 05:45:49,000 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 3.4014084507042255) internal successors, (483), 141 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2024-11-09 05:45:49,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:45:49,001 INFO L225 Difference]: With dead ends: 327 [2024-11-09 05:45:49,001 INFO L226 Difference]: Without dead ends: 325 [2024-11-09 05:45:49,003 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 362 SyntacticMatches, 23 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7287 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=532, Invalid=22118, Unknown=0, NotChecked=0, Total=22650 [2024-11-09 05:45:49,004 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 2328 mSDsCounter, 0 mSdLazyCounter, 11688 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2358 SdHoareTripleChecker+Invalid, 11688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:45:49,004 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 2358 Invalid, 11688 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 11688 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-09 05:45:49,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-11-09 05:45:49,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 235. [2024-11-09 05:45:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.106837606837607) internal successors, (259), 234 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:49,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 259 transitions. [2024-11-09 05:45:49,210 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 259 transitions. Word has length 162 [2024-11-09 05:45:49,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:45:49,210 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 259 transitions. [2024-11-09 05:45:49,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 3.4014084507042255) internal successors, (483), 141 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:45:49,210 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 259 transitions. [2024-11-09 05:45:49,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2024-11-09 05:45:49,211 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:45:49,211 INFO L215 NwaCegarLoop]: trace histogram [25, 25, 24, 22, 22, 21, 21, 1, 1, 1, 1, 1] [2024-11-09 05:45:49,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2024-11-09 05:45:49,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:49,412 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:45:49,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:45:49,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2076977580, now seen corresponding path program 59 times [2024-11-09 05:45:49,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:45:49,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902642176] [2024-11-09 05:45:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:49,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:45:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1803 backedges. 0 proven. 1803 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:45:52,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:45:52,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902642176] [2024-11-09 05:45:52,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902642176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:45:52,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341867183] [2024-11-09 05:45:52,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:45:52,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:52,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:45:52,587 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:45:52,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-11-09 05:46:00,295 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2024-11-09 05:46:00,295 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:46:00,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-11-09 05:46:00,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:46:00,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:46:00,719 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:46:00,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:46:02,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:46:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1803 backedges. 0 proven. 1803 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:46:02,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:46:05,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:46:05,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-09 05:46:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1803 backedges. 0 proven. 1803 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:46:08,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341867183] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:46:08,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [542849954] [2024-11-09 05:46:08,162 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:46:08,162 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:46:08,163 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:46:08,163 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:46:08,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:46:08,328 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:46:13,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66447#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:46:13,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:46:13,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:46:13,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 120 [2024-11-09 05:46:13,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750162070] [2024-11-09 05:46:13,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:46:13,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2024-11-09 05:46:13,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:46:13,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2024-11-09 05:46:13,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=15844, Unknown=0, NotChecked=0, Total=16256 [2024-11-09 05:46:13,654 INFO L87 Difference]: Start difference. First operand 235 states and 259 transitions. Second operand has 121 states, 121 states have (on average 3.4710743801652892) internal successors, (420), 120 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:46:20,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:46:20,304 INFO L93 Difference]: Finished difference Result 325 states and 349 transitions. [2024-11-09 05:46:20,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-09 05:46:20,305 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.4710743801652892) internal successors, (420), 120 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2024-11-09 05:46:20,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:46:20,306 INFO L225 Difference]: With dead ends: 325 [2024-11-09 05:46:20,306 INFO L226 Difference]: Without dead ends: 323 [2024-11-09 05:46:20,307 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 393 SyntacticMatches, 23 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5856 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=644, Invalid=22006, Unknown=0, NotChecked=0, Total=22650 [2024-11-09 05:46:20,307 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 313 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 10227 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 10230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:46:20,307 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 1763 Invalid, 10230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10227 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-09 05:46:20,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-11-09 05:46:20,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 234. [2024-11-09 05:46:20,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.1072961373390557) internal successors, (258), 233 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:46:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 258 transitions. [2024-11-09 05:46:20,501 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 258 transitions. Word has length 165 [2024-11-09 05:46:20,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:46:20,502 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 258 transitions. [2024-11-09 05:46:20,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.4710743801652892) internal successors, (420), 120 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:46:20,502 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 258 transitions. [2024-11-09 05:46:20,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-11-09 05:46:20,502 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:46:20,502 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2024-11-09 05:46:20,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2024-11-09 05:46:20,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-09 05:46:20,703 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:46:20,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:46:20,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1209940088, now seen corresponding path program 60 times [2024-11-09 05:46:20,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:46:20,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417991793] [2024-11-09 05:46:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:46:20,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:46:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:46:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1818 backedges. 905 proven. 913 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:46:22,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:46:22,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417991793] [2024-11-09 05:46:22,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417991793] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:46:22,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859372117] [2024-11-09 05:46:22,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:46:22,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:46:22,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:46:22,305 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:46:22,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-11-09 05:46:24,166 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:46:24,166 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:46:24,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 05:46:24,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:46:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1818 backedges. 990 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:46:25,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:46:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1818 backedges. 990 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:46:26,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859372117] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:46:26,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [426767297] [2024-11-09 05:46:26,681 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:46:26,681 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:46:26,681 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:46:26,681 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:46:26,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:46:26,859 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:46:28,984 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '68285#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:46:28,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:46:28,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:46:28,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 73 [2024-11-09 05:46:28,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986871051] [2024-11-09 05:46:28,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:46:28,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-09 05:46:28,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:46:28,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-09 05:46:28,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=5197, Unknown=0, NotChecked=0, Total=6480 [2024-11-09 05:46:28,987 INFO L87 Difference]: Start difference. First operand 234 states and 258 transitions. Second operand has 74 states, 74 states have (on average 3.581081081081081) internal successors, (265), 73 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:46:29,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:46:29,895 INFO L93 Difference]: Finished difference Result 330 states and 354 transitions. [2024-11-09 05:46:29,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-09 05:46:29,896 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.581081081081081) internal successors, (265), 73 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2024-11-09 05:46:29,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:46:29,897 INFO L225 Difference]: With dead ends: 330 [2024-11-09 05:46:29,897 INFO L226 Difference]: Without dead ends: 234 [2024-11-09 05:46:29,897 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 397 SyntacticMatches, 68 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5786 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1283, Invalid=5197, Unknown=0, NotChecked=0, Total=6480 [2024-11-09 05:46:29,898 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:46:29,898 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 377 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:46:29,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-09 05:46:30,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2024-11-09 05:46:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.1030042918454936) internal successors, (257), 233 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:46:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 257 transitions. [2024-11-09 05:46:30,119 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 257 transitions. Word has length 166 [2024-11-09 05:46:30,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:46:30,119 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 257 transitions. [2024-11-09 05:46:30,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.581081081081081) internal successors, (265), 73 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:46:30,120 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 257 transitions. [2024-11-09 05:46:30,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-11-09 05:46:30,120 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:46:30,121 INFO L215 NwaCegarLoop]: trace histogram [25, 25, 24, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2024-11-09 05:46:30,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-11-09 05:46:30,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-09 05:46:30,321 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:46:30,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:46:30,322 INFO L85 PathProgramCache]: Analyzing trace with hash 131241659, now seen corresponding path program 61 times [2024-11-09 05:46:30,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:46:30,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069191218] [2024-11-09 05:46:30,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:46:30,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:46:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:46:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:46:33,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:46:33,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069191218] [2024-11-09 05:46:33,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069191218] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:46:33,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449394562] [2024-11-09 05:46:33,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:46:33,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:46:33,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:46:33,536 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:46:33,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-11-09 05:46:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:46:34,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-11-09 05:46:34,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:46:35,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:46:38,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:46:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:46:38,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:46:41,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:46:41,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:46:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:46:44,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449394562] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:46:44,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1041220114] [2024-11-09 05:46:44,251 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:46:44,251 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:46:44,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:46:44,252 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:46:44,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:46:44,432 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:46:50,256 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '70176#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:46:50,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:46:50,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:46:50,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 147 [2024-11-09 05:46:50,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303242180] [2024-11-09 05:46:50,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:46:50,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2024-11-09 05:46:50,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:46:50,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2024-11-09 05:46:50,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=23332, Unknown=0, NotChecked=0, Total=23870 [2024-11-09 05:46:50,260 INFO L87 Difference]: Start difference. First operand 234 states and 257 transitions. Second operand has 148 states, 148 states have (on average 3.4054054054054053) internal successors, (504), 147 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:46:57,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:46:57,296 INFO L93 Difference]: Finished difference Result 335 states and 358 transitions. [2024-11-09 05:46:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-09 05:46:57,296 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 3.4054054054054053) internal successors, (504), 147 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2024-11-09 05:46:57,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:46:57,297 INFO L225 Difference]: With dead ends: 335 [2024-11-09 05:46:57,297 INFO L226 Difference]: Without dead ends: 333 [2024-11-09 05:46:57,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 379 SyntacticMatches, 23 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7843 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=553, Invalid=23939, Unknown=0, NotChecked=0, Total=24492 [2024-11-09 05:46:57,299 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 22 mSDsluCounter, 2431 mSDsCounter, 0 mSdLazyCounter, 12273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2462 SdHoareTripleChecker+Invalid, 12273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:46:57,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2462 Invalid, 12273 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 12273 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2024-11-09 05:46:57,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-11-09 05:46:57,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 239. [2024-11-09 05:46:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.1008403361344539) internal successors, (262), 238 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:46:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 262 transitions. [2024-11-09 05:46:57,570 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 262 transitions. Word has length 169 [2024-11-09 05:46:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:46:57,570 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 262 transitions. [2024-11-09 05:46:57,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 3.4054054054054053) internal successors, (504), 147 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:46:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 262 transitions. [2024-11-09 05:46:57,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-09 05:46:57,575 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:46:57,575 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 25, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2024-11-09 05:46:57,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-11-09 05:46:57,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-09 05:46:57,776 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:46:57,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:46:57,776 INFO L85 PathProgramCache]: Analyzing trace with hash -804088152, now seen corresponding path program 62 times [2024-11-09 05:46:57,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:46:57,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058895348] [2024-11-09 05:46:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:46:57,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:46:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:47:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1965 backedges. 0 proven. 1965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:47:01,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:47:01,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058895348] [2024-11-09 05:47:01,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058895348] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:47:01,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568160332] [2024-11-09 05:47:01,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:47:01,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:01,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:47:01,209 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:47:01,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-11-09 05:47:13,538 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2024-11-09 05:47:13,539 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:47:13,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-11-09 05:47:13,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:47:13,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:47:13,966 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:47:13,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:47:16,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:47:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1965 backedges. 0 proven. 1965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:47:16,159 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:47:18,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:47:18,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-09 05:47:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1965 backedges. 0 proven. 1965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:47:20,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568160332] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:47:20,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1990580181] [2024-11-09 05:47:20,980 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:47:20,980 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:47:20,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:47:20,980 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:47:20,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:47:21,162 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:47:22,853 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '72078#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:47:22,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:47:22,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:47:22,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 125 [2024-11-09 05:47:22,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981616626] [2024-11-09 05:47:22,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:47:22,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2024-11-09 05:47:22,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:47:22,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2024-11-09 05:47:22,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=17128, Unknown=0, NotChecked=0, Total=17556 [2024-11-09 05:47:22,857 INFO L87 Difference]: Start difference. First operand 239 states and 262 transitions. Second operand has 126 states, 126 states have (on average 3.4761904761904763) internal successors, (438), 125 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:47:31,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:47:31,934 INFO L93 Difference]: Finished difference Result 333 states and 356 transitions. [2024-11-09 05:47:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-09 05:47:31,935 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 3.4761904761904763) internal successors, (438), 125 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2024-11-09 05:47:31,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:47:31,936 INFO L225 Difference]: With dead ends: 333 [2024-11-09 05:47:31,936 INFO L226 Difference]: Without dead ends: 331 [2024-11-09 05:47:31,937 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 432 SyntacticMatches, 2 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4521 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=670, Invalid=23822, Unknown=0, NotChecked=0, Total=24492 [2024-11-09 05:47:31,938 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 204 mSDsluCounter, 2002 mSDsCounter, 0 mSdLazyCounter, 12262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 2028 SdHoareTripleChecker+Invalid, 12264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:47:31,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 2028 Invalid, 12264 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 12262 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2024-11-09 05:47:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2024-11-09 05:47:32,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 238. [2024-11-09 05:47:32,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.1012658227848102) internal successors, (261), 237 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:47:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 261 transitions. [2024-11-09 05:47:32,145 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 261 transitions. Word has length 172 [2024-11-09 05:47:32,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:47:32,145 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 261 transitions. [2024-11-09 05:47:32,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 3.4761904761904763) internal successors, (438), 125 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:47:32,145 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 261 transitions. [2024-11-09 05:47:32,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2024-11-09 05:47:32,146 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:47:32,146 INFO L215 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1] [2024-11-09 05:47:32,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2024-11-09 05:47:32,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-09 05:47:32,347 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:47:32,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:47:32,347 INFO L85 PathProgramCache]: Analyzing trace with hash 599575458, now seen corresponding path program 63 times [2024-11-09 05:47:32,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:47:32,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78729404] [2024-11-09 05:47:32,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:47:32,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:47:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:47:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 992 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:47:34,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:47:34,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78729404] [2024-11-09 05:47:34,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78729404] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:47:34,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233262970] [2024-11-09 05:47:34,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:47:34,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:34,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:47:34,278 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:47:34,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-11-09 05:47:40,221 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:47:40,221 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:47:40,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 05:47:40,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:47:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 1081 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:47:41,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:47:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 1081 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:47:43,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233262970] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:47:43,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [420377276] [2024-11-09 05:47:43,224 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:47:43,224 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:47:43,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:47:43,225 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:47:43,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:47:43,387 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:47:46,192 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '73978#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:47:46,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:47:46,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:47:46,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 76 [2024-11-09 05:47:46,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732587769] [2024-11-09 05:47:46,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:47:46,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-09 05:47:46,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:47:46,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-09 05:47:46,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1385, Invalid=5587, Unknown=0, NotChecked=0, Total=6972 [2024-11-09 05:47:46,195 INFO L87 Difference]: Start difference. First operand 238 states and 261 transitions. Second operand has 77 states, 77 states have (on average 3.5844155844155843) internal successors, (276), 76 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:47:47,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:47:47,287 INFO L93 Difference]: Finished difference Result 338 states and 361 transitions. [2024-11-09 05:47:47,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-09 05:47:47,287 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.5844155844155843) internal successors, (276), 76 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2024-11-09 05:47:47,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:47:47,289 INFO L225 Difference]: With dead ends: 338 [2024-11-09 05:47:47,289 INFO L226 Difference]: Without dead ends: 238 [2024-11-09 05:47:47,289 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 414 SyntacticMatches, 71 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6253 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1385, Invalid=5587, Unknown=0, NotChecked=0, Total=6972 [2024-11-09 05:47:47,290 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:47:47,290 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 309 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:47:47,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-09 05:47:47,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2024-11-09 05:47:47,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.0970464135021096) internal successors, (260), 237 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:47:47,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 260 transitions. [2024-11-09 05:47:47,495 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 260 transitions. Word has length 173 [2024-11-09 05:47:47,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:47:47,495 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 260 transitions. [2024-11-09 05:47:47,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.5844155844155843) internal successors, (276), 76 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:47:47,495 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 260 transitions. [2024-11-09 05:47:47,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-09 05:47:47,496 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:47:47,496 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 25, 24, 24, 23, 23, 1, 1, 1, 1, 1] [2024-11-09 05:47:47,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2024-11-09 05:47:47,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:47,697 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:47:47,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:47:47,697 INFO L85 PathProgramCache]: Analyzing trace with hash -890172145, now seen corresponding path program 64 times [2024-11-09 05:47:47,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:47:47,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072101243] [2024-11-09 05:47:47,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:47:47,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:47:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:47:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 0 proven. 2056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:47:51,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:47:51,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072101243] [2024-11-09 05:47:51,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072101243] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:47:51,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512873734] [2024-11-09 05:47:51,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:47:51,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:51,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:47:51,129 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:47:51,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-11-09 05:47:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:47:51,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-11-09 05:47:51,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:47:54,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:47:57,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:47:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 0 proven. 2056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:47:57,725 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:48:00,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:48:00,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 05:48:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 0 proven. 2056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:48:03,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512873734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:48:03,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2057206072] [2024-11-09 05:48:03,303 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:48:03,303 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:48:03,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:48:03,303 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:48:03,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:48:03,453 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:48:10,000 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75932#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:48:10,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:48:10,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:48:10,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 153 [2024-11-09 05:48:10,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614275834] [2024-11-09 05:48:10,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:48:10,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2024-11-09 05:48:10,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:48:10,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2024-11-09 05:48:10,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=25201, Unknown=0, NotChecked=0, Total=25760 [2024-11-09 05:48:10,004 INFO L87 Difference]: Start difference. First operand 238 states and 260 transitions. Second operand has 154 states, 154 states have (on average 3.409090909090909) internal successors, (525), 153 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:48:18,555 INFO L93 Difference]: Finished difference Result 343 states and 365 transitions. [2024-11-09 05:48:18,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-09 05:48:18,555 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 3.409090909090909) internal successors, (525), 153 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2024-11-09 05:48:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:48:18,557 INFO L225 Difference]: With dead ends: 343 [2024-11-09 05:48:18,557 INFO L226 Difference]: Without dead ends: 341 [2024-11-09 05:48:18,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 395 SyntacticMatches, 24 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8469 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=574, Invalid=25832, Unknown=0, NotChecked=0, Total=26406 [2024-11-09 05:48:18,558 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 2974 mSDsCounter, 0 mSdLazyCounter, 15250 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 3006 SdHoareTripleChecker+Invalid, 15250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:48:18,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 3006 Invalid, 15250 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 15250 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2024-11-09 05:48:18,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2024-11-09 05:48:18,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 243. [2024-11-09 05:48:18,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0950413223140496) internal successors, (265), 242 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 265 transitions. [2024-11-09 05:48:18,790 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 265 transitions. Word has length 176 [2024-11-09 05:48:18,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:48:18,791 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 265 transitions. [2024-11-09 05:48:18,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 3.409090909090909) internal successors, (525), 153 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:18,791 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 265 transitions. [2024-11-09 05:48:18,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2024-11-09 05:48:18,792 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:48:18,792 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 26, 24, 24, 23, 23, 1, 1, 1, 1, 1] [2024-11-09 05:48:18,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2024-11-09 05:48:18,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:48:18,993 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:48:18,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:48:18,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2063943550, now seen corresponding path program 65 times [2024-11-09 05:48:18,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:48:18,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492993382] [2024-11-09 05:48:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:48:18,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:48:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:48:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 0 proven. 2134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:48:22,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:48:22,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492993382] [2024-11-09 05:48:22,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492993382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:48:22,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733721217] [2024-11-09 05:48:22,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:48:22,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:48:22,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:48:22,422 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:48:22,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-11-09 05:48:33,433 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2024-11-09 05:48:33,433 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:48:33,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-09 05:48:33,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:48:33,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 05:48:33,860 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 05:48:33,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 05:48:36,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-09 05:48:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 0 proven. 2134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:48:36,116 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:48:38,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-09 05:48:38,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2024-11-09 05:48:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 0 proven. 2134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:48:41,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733721217] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:48:41,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [62532726] [2024-11-09 05:48:41,307 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:48:41,307 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:48:41,307 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:48:41,307 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:48:41,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:48:41,439 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:48:46,617 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '77896#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:48:46,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:48:46,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:48:46,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 130 [2024-11-09 05:48:46,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713543275] [2024-11-09 05:48:46,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:48:46,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-11-09 05:48:46,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:48:46,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-11-09 05:48:46,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=18462, Unknown=0, NotChecked=0, Total=18906 [2024-11-09 05:48:46,620 INFO L87 Difference]: Start difference. First operand 243 states and 265 transitions. Second operand has 131 states, 131 states have (on average 3.480916030534351) internal successors, (456), 130 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:55,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:48:55,063 INFO L93 Difference]: Finished difference Result 341 states and 363 transitions. [2024-11-09 05:48:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-09 05:48:55,063 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.480916030534351) internal successors, (456), 130 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2024-11-09 05:48:55,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:48:55,064 INFO L225 Difference]: With dead ends: 341 [2024-11-09 05:48:55,064 INFO L226 Difference]: Without dead ends: 339 [2024-11-09 05:48:55,065 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 427 SyntacticMatches, 25 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6812 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=696, Invalid=25710, Unknown=0, NotChecked=0, Total=26406 [2024-11-09 05:48:55,066 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 317 mSDsluCounter, 2238 mSDsCounter, 0 mSdLazyCounter, 13346 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 2265 SdHoareTripleChecker+Invalid, 13349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:48:55,066 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 2265 Invalid, 13349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13346 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2024-11-09 05:48:55,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2024-11-09 05:48:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 242. [2024-11-09 05:48:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.095435684647303) internal successors, (264), 241 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:55,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 264 transitions. [2024-11-09 05:48:55,265 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 264 transitions. Word has length 179 [2024-11-09 05:48:55,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:48:55,265 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 264 transitions. [2024-11-09 05:48:55,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.480916030534351) internal successors, (456), 130 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:48:55,266 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 264 transitions. [2024-11-09 05:48:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2024-11-09 05:48:55,266 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:48:55,266 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1] [2024-11-09 05:48:55,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2024-11-09 05:48:55,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:48:55,467 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:48:55,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:48:55,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1420822538, now seen corresponding path program 66 times [2024-11-09 05:48:55,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:48:55,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580453706] [2024-11-09 05:48:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:48:55,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:48:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:48:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2151 backedges. 1083 proven. 1068 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:48:57,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:48:57,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580453706] [2024-11-09 05:48:57,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580453706] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:48:57,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996228286] [2024-11-09 05:48:57,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:48:57,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:48:57,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:48:57,094 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:48:57,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-11-09 05:49:00,436 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:49:00,436 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:49:00,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-09 05:49:00,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:49:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2151 backedges. 1176 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:49:02,073 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:49:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2151 backedges. 1176 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:49:03,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996228286] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:49:03,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300857236] [2024-11-09 05:49:03,321 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:49:03,321 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:49:03,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:49:03,321 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:49:03,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:49:03,473 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:49:05,907 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '79858#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 99999) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= 100000 ~N~0))' at error location [2024-11-09 05:49:05,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:49:05,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:49:05,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 79 [2024-11-09 05:49:05,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222195] [2024-11-09 05:49:05,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:49:05,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-09 05:49:05,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:49:05,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-09 05:49:05,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1491, Invalid=5991, Unknown=0, NotChecked=0, Total=7482 [2024-11-09 05:49:05,910 INFO L87 Difference]: Start difference. First operand 242 states and 264 transitions. Second operand has 80 states, 80 states have (on average 3.5875) internal successors, (287), 79 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:49:06,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:49:06,906 INFO L93 Difference]: Finished difference Result 346 states and 368 transitions. [2024-11-09 05:49:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-09 05:49:06,906 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.5875) internal successors, (287), 79 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2024-11-09 05:49:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:49:06,907 INFO L225 Difference]: With dead ends: 346 [2024-11-09 05:49:06,907 INFO L226 Difference]: Without dead ends: 242 [2024-11-09 05:49:06,908 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 431 SyntacticMatches, 74 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6738 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1491, Invalid=5991, Unknown=0, NotChecked=0, Total=7482 [2024-11-09 05:49:06,908 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:49:06,908 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 245 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:49:06,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2024-11-09 05:49:07,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2024-11-09 05:49:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.0912863070539418) internal successors, (263), 241 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:49:07,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 263 transitions. [2024-11-09 05:49:07,116 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 263 transitions. Word has length 180 [2024-11-09 05:49:07,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:49:07,117 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 263 transitions. [2024-11-09 05:49:07,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.5875) internal successors, (287), 79 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:49:07,117 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 263 transitions. [2024-11-09 05:49:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-11-09 05:49:07,117 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:49:07,118 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 26, 25, 25, 24, 24, 1, 1, 1, 1, 1] [2024-11-09 05:49:07,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2024-11-09 05:49:07,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:49:07,318 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:49:07,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:49:07,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1461669399, now seen corresponding path program 67 times [2024-11-09 05:49:07,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:49:07,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744632475] [2024-11-09 05:49:07,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:49:07,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:49:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:49:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2229 backedges. 0 proven. 2229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:49:10,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:49:10,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744632475] [2024-11-09 05:49:10,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744632475] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:49:10,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87307008] [2024-11-09 05:49:10,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:49:10,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:49:10,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:49:10,598 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:49:10,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6044cf-be1e-4ccc-ba86-f7e08e6c4a5b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-11-09 05:49:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:49:11,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-11-09 05:49:11,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:49:13,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 05:49:17,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 05:49:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2229 backedges. 0 proven. 2229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:49:17,232 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:49:20,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 05:49:20,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20