./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0b1cf2dd5b4da09460afcca66f285dbd0591f4fa3369eb070fcfcc2c1d99d315 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:42:00,843 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:42:00,950 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 02:42:00,958 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:42:00,959 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:42:00,984 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:42:00,985 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:42:00,985 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:42:00,985 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:42:00,985 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:42:00,985 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:42:00,986 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:42:00,986 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:42:00,986 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 02:42:00,987 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:42:00,988 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:42:00,988 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 02:42:00,988 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 02:42:00,989 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:42:00,989 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 02:42:00,990 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 02:42:00,990 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 02:42:00,990 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:42:00,990 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 02:42:00,990 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:42:00,991 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 02:42:00,991 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:42:00,991 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:42:00,991 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 02:42:00,991 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:42:00,991 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 02:42:00,991 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:42:00,992 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:42:00,992 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 02:42:00,992 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:42:00,992 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:42:00,992 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:42:00,992 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:42:00,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:42:00,993 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:42:00,993 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:42:00,993 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 02:42:00,993 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 02:42:00,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 02:42:00,993 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:42:00,993 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:42:00,993 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 02:42:00,994 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b1cf2dd5b4da09460afcca66f285dbd0591f4fa3369eb070fcfcc2c1d99d315 [2024-11-14 02:42:01,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:42:01,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:42:01,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:42:01,343 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:42:01,343 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:42:01,344 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i Unable to find full path for "g++" [2024-11-14 02:42:03,256 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:42:03,571 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:42:03,572 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i [2024-11-14 02:42:03,590 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/data/b9043d3e0/22c3ffb960214b35bb940b2a033e6c70/FLAG3913d6655 [2024-11-14 02:42:03,604 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/data/b9043d3e0/22c3ffb960214b35bb940b2a033e6c70 [2024-11-14 02:42:03,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:42:03,609 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:42:03,612 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:42:03,612 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:42:03,617 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:42:03,619 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:42:03" (1/1) ... [2024-11-14 02:42:03,622 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145e9c3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:03, skipping insertion in model container [2024-11-14 02:42:03,622 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:42:03" (1/1) ... [2024-11-14 02:42:03,667 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:42:03,975 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_bdf6c192-f603-4e02-8e58-4ea93ca725b8/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i[23814,23827] [2024-11-14 02:42:03,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:42:03,990 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:42:04,032 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_bdf6c192-f603-4e02-8e58-4ea93ca725b8/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i[23814,23827] [2024-11-14 02:42:04,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:42:04,074 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:42:04,074 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04 WrapperNode [2024-11-14 02:42:04,074 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:42:04,075 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:42:04,076 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:42:04,076 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:42:04,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,091 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,107 INFO L138 Inliner]: procedures = 125, calls = 15, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 85 [2024-11-14 02:42:04,107 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:42:04,108 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:42:04,108 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:42:04,108 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:42:04,114 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,114 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,116 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,117 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,122 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,126 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,127 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,127 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,129 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:42:04,130 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:42:04,130 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:42:04,130 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:42:04,131 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (1/1) ... [2024-11-14 02:42:04,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:42:04,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:04,168 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:42:04,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:42:04,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 02:42:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 02:42:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-14 02:42:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-14 02:42:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 02:42:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 02:42:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:42:04,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:42:04,319 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:42:04,321 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:42:04,484 INFO L? ?]: Removed 27 outVars from TransFormulas that were not future-live. [2024-11-14 02:42:04,484 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:42:04,561 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:42:04,561 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-14 02:42:04,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:42:04 BoogieIcfgContainer [2024-11-14 02:42:04,561 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:42:04,565 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:42:04,565 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:42:04,570 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:42:04,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:42:03" (1/3) ... [2024-11-14 02:42:04,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499aeb7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:42:04, skipping insertion in model container [2024-11-14 02:42:04,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:04" (2/3) ... [2024-11-14 02:42:04,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499aeb7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:42:04, skipping insertion in model container [2024-11-14 02:42:04,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:42:04" (3/3) ... [2024-11-14 02:42:04,573 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_length_check-2.i [2024-11-14 02:42:04,589 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:42:04,590 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sll_length_check-2.i that has 1 procedures, 14 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-14 02:42:04,651 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:42:04,665 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;@1a2c796d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:42:04,666 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 02:42:04,670 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:04,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 02:42:04,676 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:04,676 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:04,677 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:04,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:04,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1337737626, now seen corresponding path program 1 times [2024-11-14 02:42:04,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:04,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833681673] [2024-11-14 02:42:04,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:04,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:04,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:04,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833681673] [2024-11-14 02:42:04,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833681673] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:42:04,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:42:04,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:42:04,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134776033] [2024-11-14 02:42:04,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:42:04,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 02:42:04,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:04,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 02:42:04,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 02:42:04,874 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 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 2 states, 2 states have (on average 3.5) 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) [2024-11-14 02:42:04,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:04,917 INFO L93 Difference]: Finished difference Result 25 states and 35 transitions. [2024-11-14 02:42:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 02:42:04,923 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) 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 [2024-11-14 02:42:04,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:04,930 INFO L225 Difference]: With dead ends: 25 [2024-11-14 02:42:04,930 INFO L226 Difference]: Without dead ends: 10 [2024-11-14 02:42:04,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 02:42:04,937 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:04,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:42:04,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-14 02:42:04,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-11-14 02:42:04,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:04,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2024-11-14 02:42:04,972 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2024-11-14 02:42:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:04,972 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2024-11-14 02:42:04,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) 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) [2024-11-14 02:42:04,972 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2024-11-14 02:42:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 02:42:04,973 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:04,975 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:04,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 02:42:04,976 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:04,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:04,977 INFO L85 PathProgramCache]: Analyzing trace with hash -910576092, now seen corresponding path program 1 times [2024-11-14 02:42:04,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:04,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890682250] [2024-11-14 02:42:04,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:04,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:05,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:05,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890682250] [2024-11-14 02:42:05,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890682250] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:42:05,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:42:05,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:42:05,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138663043] [2024-11-14 02:42:05,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:42:05,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:42:05,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:05,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:42:05,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:42:05,153 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:05,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:05,204 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2024-11-14 02:42:05,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:42:05,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 02:42:05,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:05,205 INFO L225 Difference]: With dead ends: 16 [2024-11-14 02:42:05,205 INFO L226 Difference]: Without dead ends: 12 [2024-11-14 02:42:05,205 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:42:05,206 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:05,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 7 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:42:05,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-14 02:42:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2024-11-14 02:42:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2024-11-14 02:42:05,214 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2024-11-14 02:42:05,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:05,214 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2024-11-14 02:42:05,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:05,214 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2024-11-14 02:42:05,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 02:42:05,214 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:05,214 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:05,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 02:42:05,215 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:05,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:05,219 INFO L85 PathProgramCache]: Analyzing trace with hash -583184004, now seen corresponding path program 1 times [2024-11-14 02:42:05,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:05,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120792709] [2024-11-14 02:42:05,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:05,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:05,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:05,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120792709] [2024-11-14 02:42:05,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120792709] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:42:05,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:42:05,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 02:42:05,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032286859] [2024-11-14 02:42:05,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:42:05,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:42:05,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:05,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:42:05,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:42:05,407 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:05,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:05,475 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2024-11-14 02:42:05,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 02:42:05,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 02:42:05,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:05,476 INFO L225 Difference]: With dead ends: 16 [2024-11-14 02:42:05,476 INFO L226 Difference]: Without dead ends: 13 [2024-11-14 02:42:05,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 02:42:05,478 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:05,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:42:05,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-14 02:42:05,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2024-11-14 02:42:05,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2024-11-14 02:42:05,483 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2024-11-14 02:42:05,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:05,483 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2024-11-14 02:42:05,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:05,483 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2024-11-14 02:42:05,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 02:42:05,484 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:05,484 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:05,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 02:42:05,485 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:05,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:05,485 INFO L85 PathProgramCache]: Analyzing trace with hash -899968379, now seen corresponding path program 1 times [2024-11-14 02:42:05,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:05,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007041054] [2024-11-14 02:42:05,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:05,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:42:05,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:05,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007041054] [2024-11-14 02:42:05,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007041054] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:05,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775296859] [2024-11-14 02:42:05,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:05,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:05,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:05,715 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:05,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 02:42:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:05,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 02:42:05,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:42:05,886 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:42:05,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775296859] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:05,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1461667622] [2024-11-14 02:42:05,971 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 02:42:05,971 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:05,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:05,980 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:05,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:07,095 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:08,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '218#(exists ((|v_ULTIMATE.start_main_#t~ret12#1_17| Int) (|v_ULTIMATE.start_main_~len~1#1_16| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_#t~ret12#1_17| 2147483647) (<= 0 |v_ULTIMATE.start_main_#t~ret12#1_17|) (not (= 2 |v_ULTIMATE.start_main_#t~ret12#1_17|)) (= |v_ULTIMATE.start_main_~len~1#1_16| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0)))' at error location [2024-11-14 02:42:08,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:08,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:08,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-11-14 02:42:08,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870663451] [2024-11-14 02:42:08,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:08,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:42:08,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:08,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:42:08,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=79, Unknown=1, NotChecked=0, Total=110 [2024-11-14 02:42:08,806 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:08,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:08,894 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2024-11-14 02:42:08,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:42:08,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2024-11-14 02:42:08,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:08,895 INFO L225 Difference]: With dead ends: 19 [2024-11-14 02:42:08,895 INFO L226 Difference]: Without dead ends: 14 [2024-11-14 02:42:08,895 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=41, Invalid=114, Unknown=1, NotChecked=0, Total=156 [2024-11-14 02:42:08,896 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:08,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 10 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:08,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-14 02:42:08,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-14 02:42:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2024-11-14 02:42:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-11-14 02:42:08,903 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2024-11-14 02:42:08,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:08,903 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-11-14 02:42:08,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-11-14 02:42:08,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 02:42:08,904 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:08,905 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:08,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 02:42:09,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:09,108 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:09,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:09,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1433003987, now seen corresponding path program 2 times [2024-11-14 02:42:09,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:09,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081104398] [2024-11-14 02:42:09,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:09,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:09,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:09,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081104398] [2024-11-14 02:42:09,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081104398] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:09,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756133168] [2024-11-14 02:42:09,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:42:09,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:09,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:09,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:09,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 02:42:09,633 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 02:42:09,633 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:09,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 02:42:09,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:09,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2024-11-14 02:42:09,764 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 16 treesize of output 8 [2024-11-14 02:42:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:09,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:09,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756133168] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:09,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [519689799] [2024-11-14 02:42:09,799 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 02:42:09,799 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:09,799 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:09,800 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:09,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:10,335 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:12,319 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '357#(exists ((|v_ULTIMATE.start_main_#t~ret12#1_19| Int) (|v_ULTIMATE.start_main_~len~1#1_17| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_#t~ret12#1_19|) (= |v_ULTIMATE.start_main_~len~1#1_17| 2) (not (= 2 |v_ULTIMATE.start_main_#t~ret12#1_19|)) (<= |v_ULTIMATE.start_main_#t~ret12#1_19| 2147483647) (= |ULTIMATE.start_main_~s~0#1.offset| 0)))' at error location [2024-11-14 02:42:12,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:12,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:12,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 10 [2024-11-14 02:42:12,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150098501] [2024-11-14 02:42:12,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:12,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 02:42:12,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:12,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 02:42:12,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=202, Unknown=1, NotChecked=0, Total=240 [2024-11-14 02:42:12,324 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:12,480 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2024-11-14 02:42:12,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 02:42:12,484 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-14 02:42:12,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:12,485 INFO L225 Difference]: With dead ends: 19 [2024-11-14 02:42:12,485 INFO L226 Difference]: Without dead ends: 16 [2024-11-14 02:42:12,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=61, Invalid=318, Unknown=1, NotChecked=0, Total=380 [2024-11-14 02:42:12,486 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:12,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 39 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:12,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-14 02:42:12,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2024-11-14 02:42:12,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:12,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-11-14 02:42:12,493 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 13 [2024-11-14 02:42:12,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:12,494 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-11-14 02:42:12,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:12,504 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-11-14 02:42:12,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 02:42:12,505 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:12,505 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:12,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 02:42:12,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:12,705 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:12,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:12,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1474584076, now seen corresponding path program 3 times [2024-11-14 02:42:12,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:12,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811559391] [2024-11-14 02:42:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:12,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:42:12,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:12,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811559391] [2024-11-14 02:42:12,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811559391] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:12,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515857351] [2024-11-14 02:42:12,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:42:12,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:12,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:12,905 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:12,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 02:42:12,989 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:42:12,989 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:12,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 02:42:12,992 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:42:13,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:42:13,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515857351] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:13,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1671988328] [2024-11-14 02:42:13,169 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 02:42:13,174 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:13,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:13,177 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:13,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:13,668 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:15,835 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '508#(and (exists ((|v_ULTIMATE.start_main_#t~ret12#1_22| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_#t~ret12#1_22| 2147483647) (<= 0 |v_ULTIMATE.start_main_#t~ret12#1_22|) (not (= 2 |v_ULTIMATE.start_main_#t~ret12#1_22|)))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-14 02:42:15,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:15,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:15,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-14 02:42:15,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554333454] [2024-11-14 02:42:15,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:15,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 02:42:15,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:15,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 02:42:15,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=223, Unknown=1, NotChecked=0, Total=272 [2024-11-14 02:42:15,838 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:15,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:15,956 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2024-11-14 02:42:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 02:42:15,957 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-14 02:42:15,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:15,957 INFO L225 Difference]: With dead ends: 31 [2024-11-14 02:42:15,958 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 02:42:15,958 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=48, Invalid=223, Unknown=1, NotChecked=0, Total=272 [2024-11-14 02:42:15,959 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:15,959 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 25 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:15,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 02:42:15,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2024-11-14 02:42:15,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2024-11-14 02:42:15,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-14 02:42:15,965 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2024-11-14 02:42:15,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:15,965 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-14 02:42:15,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-14 02:42:15,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 02:42:15,966 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:15,966 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:15,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 02:42:16,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:16,170 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:16,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:16,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1531400461, now seen corresponding path program 4 times [2024-11-14 02:42:16,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:16,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604071113] [2024-11-14 02:42:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:16,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:16,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:16,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604071113] [2024-11-14 02:42:16,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604071113] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:16,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356746172] [2024-11-14 02:42:16,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:42:16,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:16,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:16,899 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:16,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 02:42:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:16,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-14 02:42:16,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:17,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-14 02:42:17,073 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 11 treesize of output 7 [2024-11-14 02:42:17,084 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 11 treesize of output 7 [2024-11-14 02:42:17,159 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 02:42:17,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-11-14 02:42:17,230 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 15 [2024-11-14 02:42:17,241 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 23 treesize of output 22 [2024-11-14 02:42:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:17,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:19,554 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_40| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_40|) 0)) (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_40| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_40|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0))) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_40| Int)) (or (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_40| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_40|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_40|) 0))))) is different from false [2024-11-14 02:42:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-14 02:42:19,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356746172] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:19,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [928282553] [2024-11-14 02:42:19,777 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 02:42:19,777 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:19,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:19,777 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:19,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:20,115 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:21,942 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '699#(and (exists ((|v_ULTIMATE.start_main_#t~ret12#1_24| Int)) (and (<= 1 |#StackHeapBarrier|) (not (= 2 |v_ULTIMATE.start_main_#t~ret12#1_24|)) (<= 0 |v_ULTIMATE.start_main_#t~ret12#1_24|) (<= |v_ULTIMATE.start_main_#t~ret12#1_24| 2147483647))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-14 02:42:21,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:21,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:21,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-11-14 02:42:21,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381803759] [2024-11-14 02:42:21,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:21,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 02:42:21,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:21,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 02:42:21,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=491, Unknown=2, NotChecked=44, Total=600 [2024-11-14 02:42:21,944 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:26,271 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2024-11-14 02:42:26,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 02:42:26,273 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-14 02:42:26,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:26,274 INFO L225 Difference]: With dead ends: 40 [2024-11-14 02:42:26,274 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 02:42:26,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=70, Invalid=532, Unknown=2, NotChecked=46, Total=650 [2024-11-14 02:42:26,275 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:26,275 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 54 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2024-11-14 02:42:26,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 02:42:26,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-11-14 02:42:26,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-11-14 02:42:26,287 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2024-11-14 02:42:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:26,287 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-11-14 02:42:26,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-11-14 02:42:26,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 02:42:26,288 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:26,289 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:26,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 02:42:26,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:26,493 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:26,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:26,493 INFO L85 PathProgramCache]: Analyzing trace with hash -2070409759, now seen corresponding path program 1 times [2024-11-14 02:42:26,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:26,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209896507] [2024-11-14 02:42:26,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:26,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 02:42:26,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:26,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209896507] [2024-11-14 02:42:26,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209896507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:26,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342146128] [2024-11-14 02:42:26,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:26,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:26,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:26,637 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:26,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 02:42:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:26,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 02:42:26,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 02:42:26,770 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 02:42:26,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342146128] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:26,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [346861967] [2024-11-14 02:42:26,824 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 02:42:26,824 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:26,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:26,824 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:26,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:27,079 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:27,329 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '915#(and (exists ((|v_ULTIMATE.start_main_#t~ret12#1_26| Int) (|v_ULTIMATE.start_main_~len~1#1_26| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_#t~ret12#1_26|) (<= 2 |v_ULTIMATE.start_main_~len~1#1_26|) (<= |v_ULTIMATE.start_main_#t~ret12#1_26| 2147483647) (not (= |v_ULTIMATE.start_main_~len~1#1_26| |v_ULTIMATE.start_main_#t~ret12#1_26|)))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-14 02:42:27,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:27,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:27,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2024-11-14 02:42:27,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518589811] [2024-11-14 02:42:27,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:27,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 02:42:27,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:27,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 02:42:27,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-14 02:42:27,331 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:27,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:27,474 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2024-11-14 02:42:27,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 02:42:27,474 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-14 02:42:27,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:27,475 INFO L225 Difference]: With dead ends: 38 [2024-11-14 02:42:27,475 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 02:42:27,475 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:42:27,476 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:27,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 14 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 02:42:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2024-11-14 02:42:27,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-14 02:42:27,482 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2024-11-14 02:42:27,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:27,483 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-14 02:42:27,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:27,483 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-14 02:42:27,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 02:42:27,483 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:27,484 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:27,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 02:42:27,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:27,687 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:27,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:27,687 INFO L85 PathProgramCache]: Analyzing trace with hash -369704267, now seen corresponding path program 5 times [2024-11-14 02:42:27,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:27,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754373856] [2024-11-14 02:42:27,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:27,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 02:42:27,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:27,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754373856] [2024-11-14 02:42:27,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754373856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:27,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559256450] [2024-11-14 02:42:27,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:42:27,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:27,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:27,822 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:27,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 02:42:27,925 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 02:42:27,925 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:27,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 02:42:27,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 02:42:27,963 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:42:27,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559256450] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:42:27,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:42:27,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-11-14 02:42:27,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220257565] [2024-11-14 02:42:27,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:42:27,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 02:42:27,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:27,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 02:42:27,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-14 02:42:27,964 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:28,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:28,061 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2024-11-14 02:42:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 02:42:28,062 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 17 [2024-11-14 02:42:28,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:28,062 INFO L225 Difference]: With dead ends: 34 [2024-11-14 02:42:28,062 INFO L226 Difference]: Without dead ends: 19 [2024-11-14 02:42:28,063 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-11-14 02:42:28,064 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:28,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:28,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-14 02:42:28,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-14 02:42:28,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-11-14 02:42:28,073 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2024-11-14 02:42:28,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:28,073 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-11-14 02:42:28,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:28,073 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-11-14 02:42:28,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 02:42:28,074 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:28,074 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:28,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 02:42:28,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:28,275 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:28,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:28,275 INFO L85 PathProgramCache]: Analyzing trace with hash 292847609, now seen corresponding path program 2 times [2024-11-14 02:42:28,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:28,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101147972] [2024-11-14 02:42:28,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:28,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:42:28,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:28,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101147972] [2024-11-14 02:42:28,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101147972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:28,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084001706] [2024-11-14 02:42:28,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:42:28,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:28,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:28,772 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:28,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 02:42:28,875 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 02:42:28,875 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:28,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-14 02:42:28,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:28,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2024-11-14 02:42:29,011 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 11 treesize of output 7 [2024-11-14 02:42:29,036 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2024-11-14 02:42:29,037 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 28 treesize of output 24 [2024-11-14 02:42:29,171 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 7 treesize of output 3 [2024-11-14 02:42:29,339 INFO L349 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2024-11-14 02:42:29,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 55 [2024-11-14 02:42:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:42:29,397 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:42:29,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084001706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:29,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [37141995] [2024-11-14 02:42:29,766 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 02:42:29,766 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:29,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:29,767 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:29,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:30,002 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:30,510 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1294#(and (exists ((|v_ULTIMATE.start_main_#t~ret12#1_28| Int) (|v_ULTIMATE.start_main_~len~1#1_31| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_#t~ret12#1_28| 2147483647) (not (= |v_ULTIMATE.start_main_~len~1#1_31| |v_ULTIMATE.start_main_#t~ret12#1_28|)) (<= 0 |v_ULTIMATE.start_main_#t~ret12#1_28|) (<= 2 |v_ULTIMATE.start_main_~len~1#1_31|))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-14 02:42:30,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:30,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:30,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2024-11-14 02:42:30,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290880352] [2024-11-14 02:42:30,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:30,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 02:42:30,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:30,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 02:42:30,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2024-11-14 02:42:30,514 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:31,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:31,199 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2024-11-14 02:42:31,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 02:42:31,200 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 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 [2024-11-14 02:42:31,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:31,200 INFO L225 Difference]: With dead ends: 24 [2024-11-14 02:42:31,200 INFO L226 Difference]: Without dead ends: 21 [2024-11-14 02:42:31,201 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 02:42:31,202 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:31,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 78 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:42:31,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-14 02:42:31,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2024-11-14 02:42:31,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:31,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-11-14 02:42:31,208 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 18 [2024-11-14 02:42:31,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:31,208 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-11-14 02:42:31,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:31,208 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-11-14 02:42:31,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 02:42:31,208 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:31,208 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:31,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 02:42:31,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:31,409 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:31,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:31,410 INFO L85 PathProgramCache]: Analyzing trace with hash 487207848, now seen corresponding path program 3 times [2024-11-14 02:42:31,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:31,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477613165] [2024-11-14 02:42:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:31,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 02:42:31,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:31,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477613165] [2024-11-14 02:42:31,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477613165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:31,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496647616] [2024-11-14 02:42:31,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:42:31,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:31,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:31,699 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:31,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 02:42:31,871 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:42:31,871 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:31,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 02:42:31,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:32,201 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:32,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496647616] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:32,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [140059387] [2024-11-14 02:42:32,437 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 02:42:32,437 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:32,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:32,437 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:32,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:32,672 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:33,053 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1515#(and (exists ((|v_ULTIMATE.start_main_#t~ret12#1_31| Int) (|v_ULTIMATE.start_main_~len~1#1_39| Int)) (and (<= 0 |v_ULTIMATE.start_main_#t~ret12#1_31|) (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~len~1#1_39|) (not (= |v_ULTIMATE.start_main_~len~1#1_39| |v_ULTIMATE.start_main_#t~ret12#1_31|)) (<= |v_ULTIMATE.start_main_#t~ret12#1_31| 2147483647))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-14 02:42:33,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:33,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:33,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 23 [2024-11-14 02:42:33,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854645008] [2024-11-14 02:42:33,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:33,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 02:42:33,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:33,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 02:42:33,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2024-11-14 02:42:33,055 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:33,414 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2024-11-14 02:42:33,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 02:42:33,414 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2024-11-14 02:42:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:33,415 INFO L225 Difference]: With dead ends: 42 [2024-11-14 02:42:33,415 INFO L226 Difference]: Without dead ends: 39 [2024-11-14 02:42:33,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 02:42:33,417 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 26 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:33,417 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:42:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-14 02:42:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2024-11-14 02:42:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 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) [2024-11-14 02:42:33,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2024-11-14 02:42:33,424 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 19 [2024-11-14 02:42:33,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:33,424 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2024-11-14 02:42:33,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:33,425 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2024-11-14 02:42:33,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 02:42:33,425 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:33,425 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:33,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 02:42:33,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:33,626 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:33,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:33,626 INFO L85 PathProgramCache]: Analyzing trace with hash -2077559335, now seen corresponding path program 4 times [2024-11-14 02:42:33,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:33,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653472324] [2024-11-14 02:42:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:33,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:42:34,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:34,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653472324] [2024-11-14 02:42:34,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653472324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:34,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365864871] [2024-11-14 02:42:34,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:42:34,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:34,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:34,879 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:34,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 02:42:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:34,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-14 02:42:34,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:34,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-14 02:42:35,019 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 11 treesize of output 7 [2024-11-14 02:42:35,026 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 11 treesize of output 7 [2024-11-14 02:42:35,061 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-14 02:42:35,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-14 02:42:35,148 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 15 [2024-11-14 02:42:35,160 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 23 treesize of output 22 [2024-11-14 02:42:35,255 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-14 02:42:35,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-11-14 02:42:35,358 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-11-14 02:42:35,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 44 [2024-11-14 02:42:35,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2024-11-14 02:42:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:42:35,877 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:38,198 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_79| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79|) 0)) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) 0))) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_79| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79|) 0)) (= (let ((.cse1 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) (select (select .cse1 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (select (select .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) 0)))) is different from false [2024-11-14 02:42:41,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:42:41,130 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 4658 treesize of output 4154 [2024-11-14 02:42:41,283 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:42:41,286 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 1046 treesize of output 982 [2024-11-14 02:42:41,296 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:42:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 3 not checked. [2024-11-14 02:42:41,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365864871] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:41,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [718244279] [2024-11-14 02:42:41,872 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 02:42:41,872 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:41,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:41,873 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:41,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:42,096 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:42,754 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1790#(and (exists ((|v_ULTIMATE.start_main_~len~1#1_44| Int) (|v_ULTIMATE.start_main_#t~ret12#1_33| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~len~1#1_44|) (<= 0 |v_ULTIMATE.start_main_#t~ret12#1_33|) (not (= |v_ULTIMATE.start_main_~len~1#1_44| |v_ULTIMATE.start_main_#t~ret12#1_33|)) (<= |v_ULTIMATE.start_main_#t~ret12#1_33| 2147483647))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-14 02:42:42,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:42,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:42,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2024-11-14 02:42:42,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368945104] [2024-11-14 02:42:42,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:42,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 02:42:42,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:42,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 02:42:42,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1230, Unknown=2, NotChecked=70, Total=1406 [2024-11-14 02:42:42,757 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:44,993 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 0))) (and (= (select (select |c_#memory_$Pointer$.offset| .cse0) 0) 0) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= (select |c_#valid| .cse0) 1) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_79| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79|) 0)) (= (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) 0))) (= (select (select |c_#memory_$Pointer$.base| .cse0) 0) 0) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_79| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79|) 0)) (= (let ((.cse2 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) (select (select .cse2 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_79|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (select (select .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) 0))) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 0) 0) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse0)) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0))) is different from false [2024-11-14 02:42:45,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:45,382 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2024-11-14 02:42:45,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 02:42:45,384 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 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 20 [2024-11-14 02:42:45,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:45,388 INFO L225 Difference]: With dead ends: 45 [2024-11-14 02:42:45,388 INFO L226 Difference]: Without dead ends: 37 [2024-11-14 02:42:45,389 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=106, Invalid=1231, Unknown=3, NotChecked=142, Total=1482 [2024-11-14 02:42:45,390 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:45,390 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 106 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 243 Invalid, 0 Unknown, 45 Unchecked, 0.6s Time] [2024-11-14 02:42:45,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-14 02:42:45,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-11-14 02:42:45,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:45,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-11-14 02:42:45,414 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2024-11-14 02:42:45,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:45,414 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-11-14 02:42:45,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:45,415 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-11-14 02:42:45,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 02:42:45,415 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:45,415 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:45,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 02:42:45,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:45,616 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:45,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:45,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1966040079, now seen corresponding path program 5 times [2024-11-14 02:42:45,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:45,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129102143] [2024-11-14 02:42:45,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:45,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 02:42:45,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:45,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129102143] [2024-11-14 02:42:45,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129102143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:45,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994738843] [2024-11-14 02:42:45,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:42:45,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:45,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:45,806 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:45,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 02:42:45,945 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 02:42:45,945 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:45,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:42:45,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 02:42:45,993 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 02:42:46,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994738843] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:46,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [849723751] [2024-11-14 02:42:46,071 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 02:42:46,071 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:46,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:46,071 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:46,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:46,315 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:46,624 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2054#(and (exists ((|v_ULTIMATE.start_main_#t~ret12#1_35| Int) (|v_ULTIMATE.start_main_~len~1#1_51| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~len~1#1_51|) (<= 0 |v_ULTIMATE.start_main_#t~ret12#1_35|) (not (= |v_ULTIMATE.start_main_~len~1#1_51| |v_ULTIMATE.start_main_#t~ret12#1_35|)) (<= |v_ULTIMATE.start_main_#t~ret12#1_35| 2147483647))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-14 02:42:46,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:46,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:46,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-11-14 02:42:46,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758831271] [2024-11-14 02:42:46,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:46,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 02:42:46,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:46,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 02:42:46,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-14 02:42:46,626 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:46,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:46,770 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2024-11-14 02:42:46,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 02:42:46,770 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-14 02:42:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:46,771 INFO L225 Difference]: With dead ends: 42 [2024-11-14 02:42:46,771 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 02:42:46,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:42:46,772 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:46,772 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:46,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 02:42:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-14 02:42:46,777 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) [2024-11-14 02:42:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-11-14 02:42:46,777 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 22 [2024-11-14 02:42:46,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:46,778 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-11-14 02:42:46,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:46,778 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-11-14 02:42:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 02:42:46,778 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:46,778 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:46,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-14 02:42:46,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:46,982 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:46,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:46,983 INFO L85 PathProgramCache]: Analyzing trace with hash -272160253, now seen corresponding path program 6 times [2024-11-14 02:42:46,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:46,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488700120] [2024-11-14 02:42:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:46,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 02:42:47,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:47,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488700120] [2024-11-14 02:42:47,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488700120] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:47,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487807249] [2024-11-14 02:42:47,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:42:47,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:47,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:47,718 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:47,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 02:42:47,875 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:42:47,875 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:47,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-14 02:42:47,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:47,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-14 02:42:47,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2024-11-14 02:42:48,006 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-14 02:42:48,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-14 02:42:48,089 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 11 treesize of output 7 [2024-11-14 02:42:48,103 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 28 treesize of output 16 [2024-11-14 02:42:48,196 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-14 02:42:48,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-11-14 02:42:48,277 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-11-14 02:42:48,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 38 [2024-11-14 02:42:48,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:42:48,293 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 23 treesize of output 22 [2024-11-14 02:42:48,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:42:48,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-14 02:42:48,666 INFO L349 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2024-11-14 02:42:48,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 30 [2024-11-14 02:42:48,671 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 02:42:48,671 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:49,255 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:42:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 02:42:49,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487807249] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:49,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [783496718] [2024-11-14 02:42:49,525 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 02:42:49,525 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:49,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:49,525 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:49,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:49,760 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:50,326 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2332#(and (exists ((|v_ULTIMATE.start_main_~len~1#1_56| Int) (|v_ULTIMATE.start_main_#t~ret12#1_37| Int)) (and (<= |v_ULTIMATE.start_main_#t~ret12#1_37| 2147483647) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_#t~ret12#1_37|) (<= 2 |v_ULTIMATE.start_main_~len~1#1_56|) (not (= |v_ULTIMATE.start_main_~len~1#1_56| |v_ULTIMATE.start_main_#t~ret12#1_37|)))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-14 02:42:50,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:50,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:50,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2024-11-14 02:42:50,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028350501] [2024-11-14 02:42:50,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:50,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 02:42:50,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:50,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 02:42:50,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 02:42:50,329 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:58,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-14 02:43:00,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-14 02:43:02,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-14 02:43:05,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 02:43:05,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:43:05,764 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2024-11-14 02:43:05,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 02:43:05,764 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2024-11-14 02:43:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:43:05,765 INFO L225 Difference]: With dead ends: 29 [2024-11-14 02:43:05,765 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 02:43:05,766 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=274, Invalid=2273, Unknown=3, NotChecked=0, Total=2550 [2024-11-14 02:43:05,766 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2024-11-14 02:43:05,766 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 93 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 258 Invalid, 3 Unknown, 0 Unchecked, 8.5s Time] [2024-11-14 02:43:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 02:43:05,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-11-14 02:43:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 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) [2024-11-14 02:43:05,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2024-11-14 02:43:05,778 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 23 [2024-11-14 02:43:05,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:43:05,779 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2024-11-14 02:43:05,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:43:05,779 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2024-11-14 02:43:05,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 02:43:05,779 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:43:05,780 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:43:05,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 02:43:05,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 02:43:05,980 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:43:05,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:43:05,981 INFO L85 PathProgramCache]: Analyzing trace with hash 151833310, now seen corresponding path program 7 times [2024-11-14 02:43:05,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:43:05,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661967998] [2024-11-14 02:43:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:43:05,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:43:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:43:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 02:43:06,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:43:06,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661967998] [2024-11-14 02:43:06,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661967998] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:43:06,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843699346] [2024-11-14 02:43:06,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:43:06,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:43:06,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:43:06,200 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:43:06,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 02:43:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:43:06,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 02:43:06,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:43:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 02:43:06,520 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:43:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 02:43:06,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843699346] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:43:06,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1029042620] [2024-11-14 02:43:06,581 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 02:43:06,581 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:43:06,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:43:06,581 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:43:06,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:43:06,792 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:43:07,095 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2600#(and (exists ((|v_ULTIMATE.start_main_~len~1#1_66| Int) (|v_ULTIMATE.start_main_#t~ret12#1_40| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_#t~ret12#1_40| 2147483647) (not (= |v_ULTIMATE.start_main_~len~1#1_66| |v_ULTIMATE.start_main_#t~ret12#1_40|)) (<= 0 |v_ULTIMATE.start_main_#t~ret12#1_40|) (<= 2 |v_ULTIMATE.start_main_~len~1#1_66|))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-14 02:43:07,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:43:07,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:43:07,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2024-11-14 02:43:07,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458719209] [2024-11-14 02:43:07,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:43:07,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 02:43:07,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:43:07,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 02:43:07,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:43:07,097 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:43:07,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:43:07,266 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2024-11-14 02:43:07,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 02:43:07,266 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-14 02:43:07,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:43:07,267 INFO L225 Difference]: With dead ends: 47 [2024-11-14 02:43:07,267 INFO L226 Difference]: Without dead ends: 44 [2024-11-14 02:43:07,267 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:43:07,267 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:43:07,268 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 40 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:43:07,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-14 02:43:07,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2024-11-14 02:43:07,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:43:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2024-11-14 02:43:07,278 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 24 [2024-11-14 02:43:07,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:43:07,278 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2024-11-14 02:43:07,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:43:07,278 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2024-11-14 02:43:07,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 02:43:07,279 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:43:07,279 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:43:07,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 02:43:07,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 02:43:07,483 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:43:07,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:43:07,484 INFO L85 PathProgramCache]: Analyzing trace with hash 410731875, now seen corresponding path program 8 times [2024-11-14 02:43:07,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:43:07,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481377083] [2024-11-14 02:43:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:43:07,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:43:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:43:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 02:43:09,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:43:09,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481377083] [2024-11-14 02:43:09,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481377083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:43:09,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265786952] [2024-11-14 02:43:09,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:43:09,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:43:09,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:43:09,317 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:43:09,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 02:43:09,473 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 02:43:09,473 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:43:09,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-11-14 02:43:09,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:43:09,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-14 02:43:09,522 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 11 treesize of output 7 [2024-11-14 02:43:09,536 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 11 treesize of output 7 [2024-11-14 02:43:09,579 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-14 02:43:09,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-14 02:43:09,634 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 23 treesize of output 22 [2024-11-14 02:43:09,650 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 15 [2024-11-14 02:43:09,788 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2024-11-14 02:43:09,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2024-11-14 02:43:09,916 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-11-14 02:43:09,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 49 [2024-11-14 02:43:09,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2024-11-14 02:43:10,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:43:10,058 INFO L349 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2024-11-14 02:43:10,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2024-11-14 02:43:10,205 INFO L349 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2024-11-14 02:43:10,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 141 treesize of output 69 [2024-11-14 02:43:10,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:43:10,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:43:10,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 62 [2024-11-14 02:43:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 02:43:10,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:43:42,113 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 02:43:42,113 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 40822 treesize of output 40310 [2024-11-14 02:43:42,222 INFO L349 Elim1Store]: treesize reduction 41, result has 29.3 percent of original size [2024-11-14 02:43:42,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173496 treesize of output 169344 [2024-11-14 02:43:42,767 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:43:42,768 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:43:42,771 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:43:42,891 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:43:42,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 2526349 treesize of output 2192934 [2024-11-14 02:43:50,312 WARN L286 SmtUtils]: Spent 7.42s on a formula simplification. DAG size of input: 404 DAG size of output: 617 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 02:43:50,912 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:43:50,914 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:43:50,922 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:44:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 02:44:02,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265786952] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:44:02,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [90341692] [2024-11-14 02:44:02,667 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 02:44:02,667 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:44:02,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:44:02,667 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:44:02,667 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:44:02,892 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:44:03,786 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2920#(and (exists ((|v_ULTIMATE.start_main_#t~ret12#1_42| Int) (|v_ULTIMATE.start_main_~len~1#1_71| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~len~1#1_71|) (<= 0 |v_ULTIMATE.start_main_#t~ret12#1_42|) (not (= |v_ULTIMATE.start_main_~len~1#1_71| |v_ULTIMATE.start_main_#t~ret12#1_42|)) (<= |v_ULTIMATE.start_main_#t~ret12#1_42| 2147483647))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-14 02:44:03,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:44:03,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:44:03,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2024-11-14 02:44:03,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381435147] [2024-11-14 02:44:03,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:44:03,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-14 02:44:03,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:44:03,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-14 02:44:03,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1930, Unknown=14, NotChecked=0, Total=2070 [2024-11-14 02:44:03,787 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:05,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:44:05,276 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2024-11-14 02:44:05,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 02:44:05,277 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 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 [2024-11-14 02:44:05,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:44:05,278 INFO L225 Difference]: With dead ends: 58 [2024-11-14 02:44:05,278 INFO L226 Difference]: Without dead ends: 49 [2024-11-14 02:44:05,278 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=134, Invalid=2014, Unknown=14, NotChecked=0, Total=2162 [2024-11-14 02:44:05,279 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:44:05,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 164 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 02:44:05,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-14 02:44:05,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2024-11-14 02:44:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 46 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) [2024-11-14 02:44:05,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2024-11-14 02:44:05,301 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 25 [2024-11-14 02:44:05,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:44:05,301 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2024-11-14 02:44:05,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:05,301 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2024-11-14 02:44:05,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 02:44:05,301 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:05,301 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:44:05,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 02:44:05,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 02:44:05,502 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:44:05,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:05,503 INFO L85 PathProgramCache]: Analyzing trace with hash -386338165, now seen corresponding path program 9 times [2024-11-14 02:44:05,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:05,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767418082] [2024-11-14 02:44:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:05,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 02:44:05,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:05,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767418082] [2024-11-14 02:44:05,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767418082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:44:05,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393099156] [2024-11-14 02:44:05,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:44:05,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:05,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:44:05,764 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:44:05,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 02:44:05,921 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:44:05,921 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:44:05,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 02:44:05,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:44:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 02:44:06,013 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:44:06,196 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 02:44:06,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393099156] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:44:06,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2138261568] [2024-11-14 02:44:06,198 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 02:44:06,198 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:44:06,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:44:06,198 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:44:06,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:44:06,415 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:44:06,766 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3256#(and (exists ((|v_ULTIMATE.start_main_#t~ret12#1_44| Int) (|v_ULTIMATE.start_main_~len~1#1_82| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_#t~ret12#1_44| 2147483647) (<= 0 |v_ULTIMATE.start_main_#t~ret12#1_44|) (not (= |v_ULTIMATE.start_main_~len~1#1_82| |v_ULTIMATE.start_main_#t~ret12#1_44|)) (<= 2 |v_ULTIMATE.start_main_~len~1#1_82|))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-14 02:44:06,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:44:06,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:44:06,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-11-14 02:44:06,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988783708] [2024-11-14 02:44:06,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:44:06,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 02:44:06,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:44:06,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 02:44:06,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:44:06,767 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:07,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:44:07,050 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2024-11-14 02:44:07,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 02:44:07,050 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-14 02:44:07,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:44:07,051 INFO L225 Difference]: With dead ends: 56 [2024-11-14 02:44:07,051 INFO L226 Difference]: Without dead ends: 48 [2024-11-14 02:44:07,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2024-11-14 02:44:07,052 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:44:07,053 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 18 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:44:07,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-14 02:44:07,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2024-11-14 02:44:07,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:07,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2024-11-14 02:44:07,066 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 26 [2024-11-14 02:44:07,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:44:07,066 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2024-11-14 02:44:07,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:07,067 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2024-11-14 02:44:07,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 02:44:07,068 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:07,068 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:44:07,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 02:44:07,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 02:44:07,273 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:44:07,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:07,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1938155403, now seen corresponding path program 10 times [2024-11-14 02:44:07,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:07,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719903521] [2024-11-14 02:44:07,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:07,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 02:44:07,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:07,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719903521] [2024-11-14 02:44:07,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719903521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:44:07,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373494600] [2024-11-14 02:44:07,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:44:07,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:07,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:44:07,508 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:44:07,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 02:44:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:07,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 02:44:07,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:44:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 02:44:07,720 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:44:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 02:44:07,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373494600] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:44:07,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1895892312] [2024-11-14 02:44:07,866 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 02:44:07,866 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:44:07,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:44:07,867 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:44:07,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:44:08,096 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:44:08,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3598#(and (exists ((|v_ULTIMATE.start_main_#t~ret12#1_46| Int) (|v_ULTIMATE.start_main_~len~1#1_91| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_#t~ret12#1_46|) (<= 2 |v_ULTIMATE.start_main_~len~1#1_91|) (not (= |v_ULTIMATE.start_main_~len~1#1_91| |v_ULTIMATE.start_main_#t~ret12#1_46|)) (<= |v_ULTIMATE.start_main_#t~ret12#1_46| 2147483647))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-14 02:44:08,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:44:08,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:44:08,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2024-11-14 02:44:08,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349608822] [2024-11-14 02:44:08,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:44:08,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 02:44:08,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:44:08,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 02:44:08,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-14 02:44:08,508 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:08,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:44:08,687 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2024-11-14 02:44:08,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 02:44:08,688 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-14 02:44:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:44:08,688 INFO L225 Difference]: With dead ends: 50 [2024-11-14 02:44:08,688 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 02:44:08,688 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-11-14 02:44:08,689 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:44:08,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:44:08,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 02:44:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-14 02:44:08,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2024-11-14 02:44:08,696 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2024-11-14 02:44:08,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:44:08,696 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2024-11-14 02:44:08,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:08,697 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2024-11-14 02:44:08,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 02:44:08,697 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:08,697 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:44:08,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 02:44:08,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 02:44:08,900 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:44:08,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:08,900 INFO L85 PathProgramCache]: Analyzing trace with hash -200133597, now seen corresponding path program 11 times [2024-11-14 02:44:08,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:08,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717190670] [2024-11-14 02:44:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:08,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 02:44:10,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:10,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717190670] [2024-11-14 02:44:10,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717190670] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:44:10,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691160343] [2024-11-14 02:44:10,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:44:10,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:10,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:44:10,625 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:44:10,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdf6c192-f603-4e02-8e58-4ea93ca725b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 02:44:10,810 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 02:44:10,810 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:44:10,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-14 02:44:10,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:44:10,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2024-11-14 02:44:10,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 02:44:11,034 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2024-11-14 02:44:11,035 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 1 case distinctions, treesize of input 28 treesize of output 24 [2024-11-14 02:44:11,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:44:11,152 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-14 02:44:11,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-14 02:44:11,285 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2024-11-14 02:44:11,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 30 [2024-11-14 02:44:11,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-14 02:44:11,426 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-14 02:44:11,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-11-14 02:44:11,617 INFO L349 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2024-11-14 02:44:11,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 63 [2024-11-14 02:44:11,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2024-11-14 02:44:12,392 INFO L349 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2024-11-14 02:44:12,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 82 [2024-11-14 02:44:12,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:44:12,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 37 [2024-11-14 02:44:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 02:44:12,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:44:14,802 INFO L349 Elim1Store]: treesize reduction 5312, result has 25.8 percent of original size [2024-11-14 02:44:14,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 45 case distinctions, treesize of input 202601 treesize of output 184116 [2024-11-14 02:44:50,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:44:50,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 2055 treesize of output 2560 [2024-11-14 02:51:53,400 WARN L286 SmtUtils]: Spent 7.55s on a formula simplification. DAG size of input: 4892 DAG size of output: 5019 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)