/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:15:56,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:15:56,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:15:56,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 04:15:56,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:15:56,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:15:56,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:15:56,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:15:56,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:15:56,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:15:56,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:15:56,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:15:56,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:15:56,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:15:56,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:15:56,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:15:56,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:15:57,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:15:57,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:15:57,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:15:57,007 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:15:57,022 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:15:57,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:15:57,023 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:15:57,023 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:15:57,023 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:15:57,023 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:15:57,024 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:15:57,024 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:15:57,024 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:15:57,024 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:15:57,024 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:15:57,024 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:15:57,025 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:15:57,025 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:15:57,025 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:15:57,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:15:57,026 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:15:57,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:15:57,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:15:57,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:15:57,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:15:57,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:15:57,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:15:57,029 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:15:57,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:15:57,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:15:57,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:15:57,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:15:57,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:15:57,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:15:57,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:15:57,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:15:57,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:15:57,034 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:15:57,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:15:57,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:15:57,034 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:15:57,035 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:15:57,319 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:15:57,333 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:15:57,337 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:15:57,338 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:15:57,338 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:15:57,339 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2019-11-24 04:15:57,409 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/994509a46/9e90293b0d12489e8d2e10cf917d1464/FLAG91fbf84ae [2019-11-24 04:15:57,860 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:15:57,863 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2019-11-24 04:15:57,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/994509a46/9e90293b0d12489e8d2e10cf917d1464/FLAG91fbf84ae [2019-11-24 04:15:58,243 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/994509a46/9e90293b0d12489e8d2e10cf917d1464 [2019-11-24 04:15:58,258 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:15:58,259 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:15:58,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:15:58,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:15:58,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:15:58,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:15:58" (1/1) ... [2019-11-24 04:15:58,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d996306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:58, skipping insertion in model container [2019-11-24 04:15:58,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:15:58" (1/1) ... [2019-11-24 04:15:58,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:15:58,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:15:58,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:15:58,538 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:15:58,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:15:58,682 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:15:58,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:58 WrapperNode [2019-11-24 04:15:58,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:15:58,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:15:58,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:15:58,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:15:58,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:58" (1/1) ... [2019-11-24 04:15:58,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:58" (1/1) ... [2019-11-24 04:15:58,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:15:58,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:15:58,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:15:58,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:15:58,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:58" (1/1) ... [2019-11-24 04:15:58,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:58" (1/1) ... [2019-11-24 04:15:58,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:58" (1/1) ... [2019-11-24 04:15:58,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:58" (1/1) ... [2019-11-24 04:15:58,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:58" (1/1) ... [2019-11-24 04:15:58,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:58" (1/1) ... [2019-11-24 04:15:58,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:58" (1/1) ... [2019-11-24 04:15:58,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:15:58,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:15:58,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:15:58,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:15:58,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:15:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:15:58,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:15:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:15:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:15:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:15:59,182 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:15:59,182 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-24 04:15:59,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:15:59 BoogieIcfgContainer [2019-11-24 04:15:59,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:15:59,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:15:59,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:15:59,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:15:59,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:15:58" (1/3) ... [2019-11-24 04:15:59,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212aa10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:15:59, skipping insertion in model container [2019-11-24 04:15:59,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:58" (2/3) ... [2019-11-24 04:15:59,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212aa10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:15:59, skipping insertion in model container [2019-11-24 04:15:59,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:15:59" (3/3) ... [2019-11-24 04:15:59,191 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i.v+nlh-reducer.c [2019-11-24 04:15:59,198 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:15:59,207 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-24 04:15:59,217 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-24 04:15:59,241 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:15:59,241 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:15:59,241 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:15:59,241 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:15:59,241 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:15:59,242 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:15:59,242 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:15:59,242 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:15:59,259 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-24 04:15:59,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:15:59,265 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:59,266 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:15:59,267 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:59,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:59,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1546650789, now seen corresponding path program 1 times [2019-11-24 04:15:59,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:59,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643012181] [2019-11-24 04:15:59,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:15:59,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643012181] [2019-11-24 04:15:59,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:15:59,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:15:59,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365588597] [2019-11-24 04:15:59,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:15:59,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:15:59,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:15:59,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:15:59,482 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-11-24 04:15:59,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:15:59,521 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2019-11-24 04:15:59,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:15:59,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 04:15:59,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:15:59,534 INFO L225 Difference]: With dead ends: 42 [2019-11-24 04:15:59,534 INFO L226 Difference]: Without dead ends: 28 [2019-11-24 04:15:59,537 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:15:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-24 04:15:59,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-24 04:15:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-24 04:15:59,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-11-24 04:15:59,577 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 8 [2019-11-24 04:15:59,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:15:59,577 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-11-24 04:15:59,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:15:59,578 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-11-24 04:15:59,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 04:15:59,579 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:59,579 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:15:59,579 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:59,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:59,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1412593997, now seen corresponding path program 1 times [2019-11-24 04:15:59,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:59,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904186502] [2019-11-24 04:15:59,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:15:59,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904186502] [2019-11-24 04:15:59,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:15:59,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:15:59,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906082709] [2019-11-24 04:15:59,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:15:59,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:15:59,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:15:59,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:15:59,627 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 3 states. [2019-11-24 04:15:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:15:59,679 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2019-11-24 04:15:59,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:15:59,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-24 04:15:59,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:15:59,681 INFO L225 Difference]: With dead ends: 53 [2019-11-24 04:15:59,681 INFO L226 Difference]: Without dead ends: 33 [2019-11-24 04:15:59,682 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:15:59,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-24 04:15:59,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2019-11-24 04:15:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-24 04:15:59,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-24 04:15:59,689 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 9 [2019-11-24 04:15:59,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:15:59,689 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-24 04:15:59,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:15:59,690 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-24 04:15:59,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 04:15:59,690 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:59,690 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:15:59,691 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:59,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:59,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1344104488, now seen corresponding path program 1 times [2019-11-24 04:15:59,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:59,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161923383] [2019-11-24 04:15:59,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:15:59,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161923383] [2019-11-24 04:15:59,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:15:59,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:15:59,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100027498] [2019-11-24 04:15:59,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:15:59,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:15:59,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:15:59,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:15:59,768 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 4 states. [2019-11-24 04:15:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:15:59,828 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2019-11-24 04:15:59,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:15:59,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-24 04:15:59,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:15:59,831 INFO L225 Difference]: With dead ends: 46 [2019-11-24 04:15:59,831 INFO L226 Difference]: Without dead ends: 44 [2019-11-24 04:15:59,831 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:15:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-24 04:15:59,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2019-11-24 04:15:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-24 04:15:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-24 04:15:59,849 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2019-11-24 04:15:59,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:15:59,850 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-24 04:15:59,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:15:59,851 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-24 04:15:59,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:15:59,851 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:59,852 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:15:59,853 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:59,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:59,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1220471443, now seen corresponding path program 1 times [2019-11-24 04:15:59,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:59,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786489661] [2019-11-24 04:15:59,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:15:59,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786489661] [2019-11-24 04:15:59,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:15:59,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:15:59,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112849731] [2019-11-24 04:15:59,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:15:59,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:15:59,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:15:59,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:15:59,902 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-11-24 04:15:59,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:15:59,937 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2019-11-24 04:15:59,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:15:59,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-24 04:15:59,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:15:59,938 INFO L225 Difference]: With dead ends: 49 [2019-11-24 04:15:59,939 INFO L226 Difference]: Without dead ends: 29 [2019-11-24 04:15:59,939 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:15:59,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-24 04:15:59,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2019-11-24 04:15:59,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-24 04:15:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-11-24 04:15:59,944 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 10 [2019-11-24 04:15:59,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:15:59,944 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-11-24 04:15:59,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:15:59,945 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-11-24 04:15:59,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:15:59,945 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:59,945 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:15:59,946 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:59,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:59,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1299008504, now seen corresponding path program 1 times [2019-11-24 04:15:59,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:59,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402496245] [2019-11-24 04:15:59,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:16:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:16:00,529 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2019-11-24 04:16:01,064 WARN L192 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 87 [2019-11-24 04:16:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:16:01,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402496245] [2019-11-24 04:16:01,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:16:01,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-24 04:16:01,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408784953] [2019-11-24 04:16:01,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-24 04:16:01,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:16:01,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-24 04:16:01,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-24 04:16:01,132 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 8 states. [2019-11-24 04:16:01,326 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 40 [2019-11-24 04:16:01,504 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2019-11-24 04:16:01,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:16:01,537 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-11-24 04:16:01,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-24 04:16:01,539 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-24 04:16:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:16:01,540 INFO L225 Difference]: With dead ends: 39 [2019-11-24 04:16:01,540 INFO L226 Difference]: Without dead ends: 24 [2019-11-24 04:16:01,542 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-24 04:16:01,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-24 04:16:01,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-24 04:16:01,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-24 04:16:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-24 04:16:01,549 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2019-11-24 04:16:01,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:16:01,551 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-24 04:16:01,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-24 04:16:01,551 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-24 04:16:01,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 04:16:01,552 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:16:01,552 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:16:01,552 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:16:01,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:16:01,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1999003900, now seen corresponding path program 1 times [2019-11-24 04:16:01,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:16:01,553 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279058207] [2019-11-24 04:16:01,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:16:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:16:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:16:01,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279058207] [2019-11-24 04:16:01,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:16:01,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-24 04:16:01,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315640820] [2019-11-24 04:16:01,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:16:01,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:16:01,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:16:01,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:16:01,632 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2019-11-24 04:16:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:16:01,711 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2019-11-24 04:16:01,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-24 04:16:01,712 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-24 04:16:01,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:16:01,713 INFO L225 Difference]: With dead ends: 37 [2019-11-24 04:16:01,713 INFO L226 Difference]: Without dead ends: 35 [2019-11-24 04:16:01,714 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-24 04:16:01,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-24 04:16:01,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2019-11-24 04:16:01,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-24 04:16:01,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-24 04:16:01,724 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2019-11-24 04:16:01,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:16:01,726 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-24 04:16:01,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:16:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-24 04:16:01,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:16:01,727 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:16:01,728 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:16:01,730 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:16:01,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:16:01,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1488428289, now seen corresponding path program 1 times [2019-11-24 04:16:01,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:16:01,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222613414] [2019-11-24 04:16:01,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:16:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:16:03,565 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-11-24 04:16:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:16:03,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222613414] [2019-11-24 04:16:03,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838718985] [2019-11-24 04:16:03,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:16:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:16:03,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-24 04:16:03,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:16:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:16:06,200 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:16:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:16:11,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [76156979] [2019-11-24 04:16:11,130 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-24 04:16:11,130 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:16:11,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:16:11,153 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:16:11,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:16:12,489 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:16:14,963 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2019-11-24 04:16:18,171 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2019-11-24 04:16:22,607 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 64 [2019-11-24 04:16:25,229 WARN L192 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 96 DAG size of output: 67 [2019-11-24 04:16:36,966 WARN L192 SmtUtils]: Spent 9.16 s on a formula simplification. DAG size of input: 233 DAG size of output: 104 [2019-11-24 04:17:05,058 WARN L192 SmtUtils]: Spent 19.74 s on a formula simplification. DAG size of input: 279 DAG size of output: 72 [2019-11-24 04:17:05,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:17:05,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7, 4, 4] total 22 [2019-11-24 04:17:05,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206404596] [2019-11-24 04:17:05,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-24 04:17:05,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:17:05,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-24 04:17:05,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=343, Unknown=4, NotChecked=0, Total=462 [2019-11-24 04:17:05,063 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 14 states. [2019-11-24 04:17:05,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:17:05,278 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-24 04:17:05,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-24 04:17:05,279 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-11-24 04:17:05,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:17:05,280 INFO L225 Difference]: With dead ends: 36 [2019-11-24 04:17:05,280 INFO L226 Difference]: Without dead ends: 29 [2019-11-24 04:17:05,280 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 61.6s TimeCoverageRelationStatistics Valid=115, Invalid=343, Unknown=4, NotChecked=0, Total=462 [2019-11-24 04:17:05,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-24 04:17:05,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2019-11-24 04:17:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-24 04:17:05,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-11-24 04:17:05,284 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 17 [2019-11-24 04:17:05,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:17:05,285 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-11-24 04:17:05,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-24 04:17:05,285 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-11-24 04:17:05,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-24 04:17:05,285 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:17:05,286 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:17:05,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:17:05,491 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:17:05,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:17:05,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1177646914, now seen corresponding path program 1 times [2019-11-24 04:17:05,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:17:05,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020509193] [2019-11-24 04:17:05,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:17:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:17:07,801 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (div c_ULTIMATE.start_main_~main__index1~0 4294967296)) (.cse3 (div c_ULTIMATE.start_main_~main__index2~0 4294967296))) (let ((.cse0 (* .cse3 (- 4294967296))) (.cse1 (* 4294967296 .cse2))) (or (<= c_ULTIMATE.start_main_~main__index1~0 (+ c_ULTIMATE.start_main_~main__index2~0 (* 4294967296 (div (+ c_ULTIMATE.start_main_~main__index1~0 .cse0 (- 4294967297)) 4294967296)) 1)) (and (<= (+ .cse1 (* 4294967296 (div (+ (* c_ULTIMATE.start_main_~main__index2~0 2) (* c_ULTIMATE.start_main_~main__index1~0 (- 4294967295)) .cse0 (* .cse2 18446744069414584320) 8589734594) 4294967296)) 1) (+ c_ULTIMATE.start_main_~main__index1~0 (* 4294967296 .cse3))) (<= c_ULTIMATE.start_main_~main__index2~0 (+ (* 4294967296 (div (+ c_ULTIMATE.start_main_~main__index1~0 (* .cse3 4294967296) (* .cse2 (- 4294967296)) (- 1)) 4294967296)) 99998))) (<= (+ c_ULTIMATE.start_main_~main__index1~0 4294867296) .cse1)))) is different from false [2019-11-24 04:17:09,828 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (div c_ULTIMATE.start_main_~main__index2~0 4294967296)) (.cse5 (div c_ULTIMATE.start_main_~main__index1~0 4294967296))) (let ((.cse1 (* 4294967296 .cse5)) (.cse0 (* 4294967296 .cse4))) (and (<= (+ c_ULTIMATE.start_main_~main__index1~0 .cse0 1) (+ c_ULTIMATE.start_main_~main__index2~0 .cse1)) (let ((.cse2 (* .cse4 (- 4294967296)))) (or (<= c_ULTIMATE.start_main_~main__index1~0 (+ c_ULTIMATE.start_main_~main__index2~0 (* 4294967296 (div (+ c_ULTIMATE.start_main_~main__index1~0 .cse2 (- 4294967297)) 4294967296)) 1)) (let ((.cse3 (+ c_ULTIMATE.start_main_~main__index1~0 .cse0))) (and (<= .cse3 (+ .cse1 (* 4294967296 (div (+ c_ULTIMATE.start_main_~main__index1~0 (* .cse4 4294967296) (* .cse5 (- 4294967296)) (- 1)) 4294967296)) 99997)) (<= (+ .cse1 (* 4294967296 (div (+ (* c_ULTIMATE.start_main_~main__index2~0 2) (* c_ULTIMATE.start_main_~main__index1~0 (- 4294967295)) .cse2 (* .cse5 18446744069414584320) 8589734594) 4294967296)) 1) .cse3)))))))) is different from false [2019-11-24 04:17:33,414 WARN L192 SmtUtils]: Spent 18.89 s on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2019-11-24 04:17:44,204 WARN L192 SmtUtils]: Spent 4.40 s on a formula simplification. DAG size of input: 43 DAG size of output: 37