java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:33:17,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:33:17,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:33:17,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:33:17,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:33:17,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:33:17,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:33:17,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:33:17,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:33:17,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:33:17,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:33:17,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:33:17,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:33:17,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:33:17,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:33:17,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:33:17,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:33:17,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:33:17,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:33:17,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:33:17,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:33:17,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:33:17,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:33:17,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:33:17,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:33:17,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:33:17,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:33:17,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:33:17,974 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:33:17,988 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:33:17,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:33:17,990 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:33:17,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:33:17,990 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:33:17,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:33:17,991 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:33:17,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:33:17,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:33:17,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:33:17,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:33:17,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:33:17,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:33:17,992 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:33:17,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:33:17,992 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:33:17,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:33:17,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:33:17,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:33:17,993 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:33:17,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:33:17,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:33:17,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:33:17,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:33:17,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:33:17,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:33:17,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:33:17,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:33:17,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:33:18,276 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:33:18,290 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:33:18,293 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:33:18,295 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:33:18,295 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:33:18,296 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-2.i [2019-10-15 01:33:18,369 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27de47498/30c4bc88e427450b8d736bac0591d152/FLAGae07b1efa [2019-10-15 01:33:18,841 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:33:18,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-2.i [2019-10-15 01:33:18,848 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27de47498/30c4bc88e427450b8d736bac0591d152/FLAGae07b1efa [2019-10-15 01:33:19,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27de47498/30c4bc88e427450b8d736bac0591d152 [2019-10-15 01:33:19,262 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:33:19,263 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:33:19,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:19,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:33:19,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:33:19,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6487c26e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19, skipping insertion in model container [2019-10-15 01:33:19,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,280 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:33:19,297 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:33:19,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:19,539 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:33:19,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:19,588 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:33:19,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19 WrapperNode [2019-10-15 01:33:19,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:19,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:33:19,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:33:19,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:33:19,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:33:19,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:33:19,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:33:19,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:33:19,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (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 [2019-10-15 01:33:19,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:33:19,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:33:19,786 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:33:19,786 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:33:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:33:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:33:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:33:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:33:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:33:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:33:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:33:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:33:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:33:20,180 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:33:20,181 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 01:33:20,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:20 BoogieIcfgContainer [2019-10-15 01:33:20,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:33:20,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:33:20,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:33:20,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:33:20,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:33:19" (1/3) ... [2019-10-15 01:33:20,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e01ce10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:20, skipping insertion in model container [2019-10-15 01:33:20,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (2/3) ... [2019-10-15 01:33:20,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e01ce10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:20, skipping insertion in model container [2019-10-15 01:33:20,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:20" (3/3) ... [2019-10-15 01:33:20,190 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-2.i [2019-10-15 01:33:20,200 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:33:20,206 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:33:20,218 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:33:20,242 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:33:20,243 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:33:20,243 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:33:20,243 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:33:20,243 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:33:20,244 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:33:20,244 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:33:20,244 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:33:20,258 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 01:33:20,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:33:20,263 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:20,264 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:20,266 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:20,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:20,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2065348534, now seen corresponding path program 1 times [2019-10-15 01:33:20,279 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:20,279 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897944441] [2019-10-15 01:33:20,279 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:20,280 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:20,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:20,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897944441] [2019-10-15 01:33:20,430 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:33:20,430 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:33:20,430 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168683399] [2019-10-15 01:33:20,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:33:20,435 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:20,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:33:20,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:33:20,448 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-10-15 01:33:20,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:20,513 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2019-10-15 01:33:20,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:33:20,516 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:33:20,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:20,526 INFO L225 Difference]: With dead ends: 37 [2019-10-15 01:33:20,526 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:33:20,531 INFO L600 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 [2019-10-15 01:33:20,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:33:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:33:20,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:33:20,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-10-15 01:33:20,580 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2019-10-15 01:33:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:20,581 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-10-15 01:33:20,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:33:20,581 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-10-15 01:33:20,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:33:20,582 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:20,582 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:20,583 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:20,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:20,583 INFO L82 PathProgramCache]: Analyzing trace with hash 465570675, now seen corresponding path program 1 times [2019-10-15 01:33:20,584 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:20,584 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874832655] [2019-10-15 01:33:20,584 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:20,584 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:20,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:20,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:33:20,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874832655] [2019-10-15 01:33:20,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028965356] [2019-10-15 01:33:20,659 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 [2019-10-15 01:33:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:20,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:33:20,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:33:20,761 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:33:20,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [174346981] [2019-10-15 01:33:20,849 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:33:20,849 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:20,867 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:20,875 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:20,876 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:21,055 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:21,937 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:21,959 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:21,969 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:22,561 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:22,561 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:33:22,562 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350690395] [2019-10-15 01:33:22,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:33:22,566 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:22,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:33:22,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:33:22,569 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 17 states. [2019-10-15 01:33:23,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:23,432 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2019-10-15 01:33:23,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:33:23,433 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2019-10-15 01:33:23,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:23,434 INFO L225 Difference]: With dead ends: 51 [2019-10-15 01:33:23,434 INFO L226 Difference]: Without dead ends: 38 [2019-10-15 01:33:23,436 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:33:23,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-15 01:33:23,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2019-10-15 01:33:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 01:33:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-10-15 01:33:23,444 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 16 [2019-10-15 01:33:23,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:23,445 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-10-15 01:33:23,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:33:23,445 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-10-15 01:33:23,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:33:23,446 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:23,446 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:23,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:23,651 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:23,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:23,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1023729270, now seen corresponding path program 2 times [2019-10-15 01:33:23,653 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:23,653 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125415401] [2019-10-15 01:33:23,653 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:23,653 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:23,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:33:23,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125415401] [2019-10-15 01:33:23,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459408464] [2019-10-15 01:33:23,758 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:23,829 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:33:23,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:23,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:33:23,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:33:23,842 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:33:23,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [843681227] [2019-10-15 01:33:23,900 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:33:23,900 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:23,900 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:23,901 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:23,901 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:23,947 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:24,562 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:24,575 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:24,581 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:25,153 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:25,153 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:33:25,154 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839739463] [2019-10-15 01:33:25,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:33:25,156 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:25,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:33:25,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:33:25,173 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 23 states. [2019-10-15 01:33:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:26,320 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2019-10-15 01:33:26,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:33:26,321 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2019-10-15 01:33:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:26,322 INFO L225 Difference]: With dead ends: 75 [2019-10-15 01:33:26,322 INFO L226 Difference]: Without dead ends: 56 [2019-10-15 01:33:26,324 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:33:26,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-15 01:33:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-10-15 01:33:26,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-15 01:33:26,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-10-15 01:33:26,335 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 25 [2019-10-15 01:33:26,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:26,335 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-10-15 01:33:26,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:33:26,335 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-10-15 01:33:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 01:33:26,337 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:26,337 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:26,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:26,549 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:26,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:26,550 INFO L82 PathProgramCache]: Analyzing trace with hash -173978774, now seen corresponding path program 3 times [2019-10-15 01:33:26,550 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:26,551 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522905670] [2019-10-15 01:33:26,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:26,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:26,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-15 01:33:26,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522905670] [2019-10-15 01:33:26,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159895382] [2019-10-15 01:33:26,754 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:26,831 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:33:26,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:26,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:33:26,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-15 01:33:26,850 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-15 01:33:27,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1056555965] [2019-10-15 01:33:27,061 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:33:27,061 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:27,061 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:27,062 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:27,062 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:27,099 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:27,480 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:27,487 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:27,490 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:28,368 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:28,368 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:33:28,369 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630076899] [2019-10-15 01:33:28,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:33:28,371 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:28,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:33:28,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:33:28,373 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 35 states. [2019-10-15 01:33:30,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:30,465 INFO L93 Difference]: Finished difference Result 123 states and 164 transitions. [2019-10-15 01:33:30,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:33:30,466 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2019-10-15 01:33:30,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:30,468 INFO L225 Difference]: With dead ends: 123 [2019-10-15 01:33:30,468 INFO L226 Difference]: Without dead ends: 92 [2019-10-15 01:33:30,471 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 87 SyntacticMatches, 22 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:33:30,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-15 01:33:30,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2019-10-15 01:33:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-15 01:33:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2019-10-15 01:33:30,489 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 43 [2019-10-15 01:33:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:30,489 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2019-10-15 01:33:30,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:33:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2019-10-15 01:33:30,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-15 01:33:30,492 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:30,492 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:30,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:30,706 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:30,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:30,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1373570858, now seen corresponding path program 4 times [2019-10-15 01:33:30,707 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:30,707 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410489117] [2019-10-15 01:33:30,708 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:30,708 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:30,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-10-15 01:33:31,114 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410489117] [2019-10-15 01:33:31,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667865076] [2019-10-15 01:33:31,115 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:31,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:33:31,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-10-15 01:33:31,263 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-10-15 01:33:31,917 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [996929190] [2019-10-15 01:33:31,928 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:33:31,928 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:31,929 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:31,935 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:31,935 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:31,962 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:32,427 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:32,438 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:32,442 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:34,497 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2019-10-15 01:33:34,577 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:34,577 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:33:34,578 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750502257] [2019-10-15 01:33:34,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:33:34,580 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:34,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:33:34,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:33:34,583 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 59 states. [2019-10-15 01:33:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:39,182 INFO L93 Difference]: Finished difference Result 219 states and 296 transitions. [2019-10-15 01:33:39,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:33:39,183 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 79 [2019-10-15 01:33:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:39,185 INFO L225 Difference]: With dead ends: 219 [2019-10-15 01:33:39,185 INFO L226 Difference]: Without dead ends: 164 [2019-10-15 01:33:39,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 159 SyntacticMatches, 46 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6019 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:33:39,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-10-15 01:33:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2019-10-15 01:33:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-10-15 01:33:39,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2019-10-15 01:33:39,213 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 79 [2019-10-15 01:33:39,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:39,214 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2019-10-15 01:33:39,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:33:39,214 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2019-10-15 01:33:39,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-15 01:33:39,220 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:39,220 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:39,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:39,425 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:39,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:39,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1915231914, now seen corresponding path program 5 times [2019-10-15 01:33:39,426 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:39,426 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10221473] [2019-10-15 01:33:39,426 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:39,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:39,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2019-10-15 01:33:40,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10221473] [2019-10-15 01:33:40,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689599384] [2019-10-15 01:33:40,799 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true