/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-acceleration/array_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:13:38,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:13:38,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:13:38,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:13:38,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:13:38,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:13:38,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:13:38,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:13:38,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:13:38,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:13:38,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:13:38,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:13:38,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:13:38,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:13:38,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:13:38,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:13:38,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:13:38,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:13:38,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:13:38,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:13:38,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:13:38,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:13:38,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:13:38,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:13:38,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:13:38,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:13:38,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:13:38,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:13:38,277 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 04:13:38,293 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:13:38,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:13:38,294 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:13:38,295 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:13:38,295 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:13:38,295 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:13:38,295 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:13:38,295 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:13:38,296 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:13:38,296 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:13:38,296 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:13:38,296 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:13:38,296 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:13:38,297 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:13:38,297 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:13:38,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:13:38,298 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:13:38,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:13:38,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:13:38,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:13:38,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:13:38,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:13:38,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:13:38,299 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:13:38,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:13:38,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:13:38,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:13:38,300 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:13:38,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:13:38,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:13:38,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:13:38,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:13:38,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:13:38,301 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:13:38,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:13:38,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:13:38,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:13:38,302 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:13:38,564 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:13:38,586 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:13:38,589 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:13:38,591 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:13:38,591 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:13:38,592 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-1.c [2019-11-24 04:13:38,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13ac5c82a/c531ac09f37149b4a426f6e99307f01a/FLAG875d0ac36 [2019-11-24 04:13:39,139 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:13:39,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-1.c [2019-11-24 04:13:39,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13ac5c82a/c531ac09f37149b4a426f6e99307f01a/FLAG875d0ac36 [2019-11-24 04:13:39,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13ac5c82a/c531ac09f37149b4a426f6e99307f01a [2019-11-24 04:13:39,524 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:13:39,525 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:13:39,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:13:39,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:13:39,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:13:39,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:13:39" (1/1) ... [2019-11-24 04:13:39,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3442d96a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:39, skipping insertion in model container [2019-11-24 04:13:39,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:13:39" (1/1) ... [2019-11-24 04:13:39,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:13:39,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:13:39,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:13:39,727 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:13:39,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:13:39,774 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:13:39,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:39 WrapperNode [2019-11-24 04:13:39,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:13:39,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:13:39,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:13:39,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:13:39,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:39" (1/1) ... [2019-11-24 04:13:39,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:39" (1/1) ... [2019-11-24 04:13:39,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:13:39,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:13:39,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:13:39,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:13:39,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:39" (1/1) ... [2019-11-24 04:13:39,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:39" (1/1) ... [2019-11-24 04:13:39,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:39" (1/1) ... [2019-11-24 04:13:39,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:39" (1/1) ... [2019-11-24 04:13:39,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:39" (1/1) ... [2019-11-24 04:13:39,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:39" (1/1) ... [2019-11-24 04:13:39,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:39" (1/1) ... [2019-11-24 04:13:39,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:13:39,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:13:39,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:13:39,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:13:39,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:39" (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 04:13:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:13:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:13:39,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:13:39,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:13:39,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:13:39,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:13:40,232 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:13:40,233 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 04:13:40,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:13:40 BoogieIcfgContainer [2019-11-24 04:13:40,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:13:40,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:13:40,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:13:40,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:13:40,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:13:39" (1/3) ... [2019-11-24 04:13:40,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1492e816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:13:40, skipping insertion in model container [2019-11-24 04:13:40,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:39" (2/3) ... [2019-11-24 04:13:40,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1492e816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:13:40, skipping insertion in model container [2019-11-24 04:13:40,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:13:40" (3/3) ... [2019-11-24 04:13:40,242 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-1.c [2019-11-24 04:13:40,252 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:13:40,259 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:13:40,274 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:13:40,300 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:13:40,300 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:13:40,300 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:13:40,300 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:13:40,300 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:13:40,301 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:13:40,301 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:13:40,301 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:13:40,313 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-11-24 04:13:40,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 04:13:40,319 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:13:40,320 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 04:13:40,321 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:13:40,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:13:40,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1882248, now seen corresponding path program 1 times [2019-11-24 04:13:40,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:13:40,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236332077] [2019-11-24 04:13:40,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:13:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:13:40,471 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 04:13:40,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236332077] [2019-11-24 04:13:40,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:13:40,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:13:40,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810349381] [2019-11-24 04:13:40,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:13:40,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:13:40,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:13:40,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:13:40,495 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2019-11-24 04:13:40,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:13:40,539 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2019-11-24 04:13:40,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:13:40,540 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-11-24 04:13:40,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:13:40,548 INFO L225 Difference]: With dead ends: 13 [2019-11-24 04:13:40,548 INFO L226 Difference]: Without dead ends: 6 [2019-11-24 04:13:40,551 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 04:13:40,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-11-24 04:13:40,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-11-24 04:13:40,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-24 04:13:40,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-11-24 04:13:40,587 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-11-24 04:13:40,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:13:40,587 INFO L462 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-11-24 04:13:40,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:13:40,588 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-11-24 04:13:40,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:13:40,589 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:13:40,589 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:13:40,589 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:13:40,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:13:40,590 INFO L82 PathProgramCache]: Analyzing trace with hash 58276611, now seen corresponding path program 1 times [2019-11-24 04:13:40,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:13:40,590 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530737610] [2019-11-24 04:13:40,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:13:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:13:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:13:40,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530737610] [2019-11-24 04:13:40,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672525474] [2019-11-24 04:13:40,655 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 04:13:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:13:40,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:13:40,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:13:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:13:40,739 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:13:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:13:40,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [178797347] [2019-11-24 04:13:40,788 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-11-24 04:13:40,788 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:13:40,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:13:40,800 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:13:40,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:14:39,935 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2019-11-24 04:14:40,096 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 314 [2019-11-24 04:14:40,237 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2019-11-24 04:14:40,754 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 324 [2019-11-24 04:14:43,036 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 328 [2019-11-24 04:14:46,183 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 333 [2019-11-24 04:14:46,392 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 334 [2019-11-24 04:14:51,522 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2019-11-24 04:14:53,857 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 349 [2019-11-24 04:14:56,449 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 350 [2019-11-24 04:15:02,079 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 359 [2019-11-24 04:15:07,796 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 372 [2019-11-24 04:15:07,972 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 368