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/reducercommutativity/max40-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:24:56,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:24:56,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:24:56,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:24:56,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:24:56,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:24:56,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:24:56,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:24:56,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:24:56,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:24:56,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:24:56,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:24:56,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:24:56,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:24:56,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:24:56,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:24:56,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:24:56,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:24:56,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:24:56,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:24:56,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:24:56,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:24:56,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:24:56,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:24:56,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:24:56,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:24:56,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:24:56,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:24:56,635 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 03:24:56,654 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:24:56,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:24:56,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:24:56,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:24:56,657 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:24:56,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:24:56,657 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:24:56,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:24:56,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:24:56,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:24:56,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:24:56,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:24:56,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:24:56,660 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:24:56,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:24:56,660 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:24:56,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:24:56,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:24:56,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:24:56,661 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:24:56,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:24:56,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:24:56,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:24:56,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:24:56,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:24:56,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:24:56,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:24:56,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:24:56,663 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 03:24:56,951 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:24:56,964 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:24:56,967 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:24:56,969 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:24:56,969 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:24:56,970 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max40-1.i [2019-10-15 03:24:57,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce616abc8/aa7e7e9b290d416ea3a86664f09bcab7/FLAG25dc851c6 [2019-10-15 03:24:57,490 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:24:57,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max40-1.i [2019-10-15 03:24:57,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce616abc8/aa7e7e9b290d416ea3a86664f09bcab7/FLAG25dc851c6 [2019-10-15 03:24:58,014 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce616abc8/aa7e7e9b290d416ea3a86664f09bcab7 [2019-10-15 03:24:58,026 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:24:58,028 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:24:58,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:24:58,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:24:58,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:24:58,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:24:58" (1/1) ... [2019-10-15 03:24:58,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65f3f39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:58, skipping insertion in model container [2019-10-15 03:24:58,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:24:58" (1/1) ... [2019-10-15 03:24:58,045 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:24:58,063 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:24:58,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:24:58,293 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:24:58,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:24:58,343 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:24:58,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:58 WrapperNode [2019-10-15 03:24:58,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:24:58,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:24:58,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:24:58,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:24:58,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:58" (1/1) ... [2019-10-15 03:24:58,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:58" (1/1) ... [2019-10-15 03:24:58,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:58" (1/1) ... [2019-10-15 03:24:58,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:58" (1/1) ... [2019-10-15 03:24:58,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:58" (1/1) ... [2019-10-15 03:24:58,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:58" (1/1) ... [2019-10-15 03:24:58,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:58" (1/1) ... [2019-10-15 03:24:58,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:24:58,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:24:58,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:24:58,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:24:58,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:58" (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 [2019-10-15 03:24:58,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:24:58,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:24:58,530 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2019-10-15 03:24:58,530 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:24:58,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:24:58,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:24:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure max [2019-10-15 03:24:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:24:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:24:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:24:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:24:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:24:58,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:24:58,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:24:58,979 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:24:58,980 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 03:24:58,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:24:58 BoogieIcfgContainer [2019-10-15 03:24:58,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:24:58,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:24:58,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:24:58,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:24:58,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:24:58" (1/3) ... [2019-10-15 03:24:58,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b971a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:24:58, skipping insertion in model container [2019-10-15 03:24:58,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:58" (2/3) ... [2019-10-15 03:24:58,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b971a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:24:58, skipping insertion in model container [2019-10-15 03:24:58,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:24:58" (3/3) ... [2019-10-15 03:24:58,990 INFO L109 eAbstractionObserver]: Analyzing ICFG max40-1.i [2019-10-15 03:24:59,000 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:24:59,008 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:24:59,020 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:24:59,046 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:24:59,046 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:24:59,046 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:24:59,047 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:24:59,047 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:24:59,047 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:24:59,048 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:24:59,048 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:24:59,063 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 03:24:59,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:24:59,068 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:59,069 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:24:59,071 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:59,076 INFO L82 PathProgramCache]: Analyzing trace with hash 855740909, now seen corresponding path program 1 times [2019-10-15 03:24:59,086 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:59,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953481139] [2019-10-15 03:24:59,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:59,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:59,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 03:24:59,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953481139] [2019-10-15 03:24:59,267 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:24:59,267 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:24:59,267 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839699064] [2019-10-15 03:24:59,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:24:59,273 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:59,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:24:59,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:24:59,292 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 03:24:59,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:59,330 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 03:24:59,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:24:59,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 03:24:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:59,339 INFO L225 Difference]: With dead ends: 41 [2019-10-15 03:24:59,339 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 03:24:59,343 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 03:24:59,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 03:24:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 03:24:59,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 03:24:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 03:24:59,382 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 03:24:59,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:59,383 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 03:24:59,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:24:59,383 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 03:24:59,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 03:24:59,386 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:59,386 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:24:59,386 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:59,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:59,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1075349738, now seen corresponding path program 1 times [2019-10-15 03:24:59,387 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:59,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868581317] [2019-10-15 03:24:59,388 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:59,388 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:59,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:24:59,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868581317] [2019-10-15 03:24:59,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570246860] [2019-10-15 03:24:59,478 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 03:24:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:59,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:24:59,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:24:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:24:59,596 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:24:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:24:59,640 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:24:59,640 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 03:24:59,640 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523059571] [2019-10-15 03:24:59,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:24:59,642 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:59,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:24:59,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:24:59,643 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 03:24:59,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:59,656 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 03:24:59,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:24:59,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 03:24:59,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:59,658 INFO L225 Difference]: With dead ends: 33 [2019-10-15 03:24:59,658 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:24:59,659 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:24:59,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:24:59,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 03:24:59,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:24:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 03:24:59,666 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 03:24:59,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:59,666 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 03:24:59,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:24:59,667 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 03:24:59,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 03:24:59,668 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:59,668 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:24:59,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:24:59,874 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:59,874 INFO L82 PathProgramCache]: Analyzing trace with hash 447698074, now seen corresponding path program 1 times [2019-10-15 03:24:59,874 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:59,875 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732838616] [2019-10-15 03:24:59,875 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:59,875 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:59,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:25:00,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732838616] [2019-10-15 03:25:00,002 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:25:00,003 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:25:00,003 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930742936] [2019-10-15 03:25:00,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:00,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:00,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:00,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:25:00,012 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 03:25:00,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:00,026 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 03:25:00,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:00,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 03:25:00,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:00,028 INFO L225 Difference]: With dead ends: 31 [2019-10-15 03:25:00,028 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 03:25:00,029 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 03:25:00,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 03:25:00,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 03:25:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 03:25:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 03:25:00,035 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 03:25:00,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:00,037 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 03:25:00,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 03:25:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 03:25:00,039 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:00,039 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:00,039 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:00,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:00,040 INFO L82 PathProgramCache]: Analyzing trace with hash -69054062, now seen corresponding path program 1 times [2019-10-15 03:25:00,040 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:00,040 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21126319] [2019-10-15 03:25:00,040 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:00,041 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:00,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:25:00,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21126319] [2019-10-15 03:25:00,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326916231] [2019-10-15 03:25:00,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 03:25:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:00,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:00,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:25:00,251 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:25:00,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1715642306] [2019-10-15 03:25:00,335 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:00,336 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:00,343 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:00,351 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:00,352 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:00,504 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:02,651 INFO L199 IcfgInterpreter]: Interpreting procedure max with input of size 1 for LOIs [2019-10-15 03:25:02,714 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:02,719 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:03,114 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:03,115 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 03:25:03,115 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392722133] [2019-10-15 03:25:03,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 03:25:03,117 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:03,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 03:25:03,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:25:03,120 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2019-10-15 03:25:03,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:03,800 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-15 03:25:03,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 03:25:03,801 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-10-15 03:25:03,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:03,802 INFO L225 Difference]: With dead ends: 40 [2019-10-15 03:25:03,802 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 03:25:03,803 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2019-10-15 03:25:03,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 03:25:03,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 03:25:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 03:25:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-15 03:25:03,810 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-10-15 03:25:03,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:03,810 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-15 03:25:03,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 03:25:03,811 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-15 03:25:03,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 03:25:03,812 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:03,812 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:04,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:04,016 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:04,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:04,016 INFO L82 PathProgramCache]: Analyzing trace with hash -493974743, now seen corresponding path program 2 times [2019-10-15 03:25:04,016 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:04,017 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384443878] [2019-10-15 03:25:04,017 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:04,018 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:04,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:25:04,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384443878] [2019-10-15 03:25:04,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355155524] [2019-10-15 03:25:04,092 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 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 03:25:04,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 03:25:04,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:04,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:04,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 03:25:04,204 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 03:25:04,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [264810461] [2019-10-15 03:25:04,243 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:04,243 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:04,244 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:04,244 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:04,246 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:04,279 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:05,829 INFO L199 IcfgInterpreter]: Interpreting procedure max with input of size 1 for LOIs [2019-10-15 03:25:05,881 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:05,887 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:06,335 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:06,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 11] total 21 [2019-10-15 03:25:06,335 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278157572] [2019-10-15 03:25:06,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 03:25:06,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:06,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 03:25:06,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-15 03:25:06,337 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 22 states. [2019-10-15 03:25:07,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:07,226 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-10-15 03:25:07,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 03:25:07,227 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2019-10-15 03:25:07,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:07,228 INFO L225 Difference]: With dead ends: 44 [2019-10-15 03:25:07,228 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 03:25:07,229 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 03:25:07,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 03:25:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-15 03:25:07,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 03:25:07,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-15 03:25:07,237 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-10-15 03:25:07,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:07,238 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-15 03:25:07,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 03:25:07,238 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-15 03:25:07,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 03:25:07,239 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:07,239 INFO L380 BasicCegarLoop]: trace histogram [12, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:07,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:07,443 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:07,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:07,444 INFO L82 PathProgramCache]: Analyzing trace with hash 132820922, now seen corresponding path program 3 times [2019-10-15 03:25:07,444 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:07,444 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066514215] [2019-10-15 03:25:07,444 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:07,444 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:07,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 03:25:07,591 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066514215] [2019-10-15 03:25:07,591 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809485865] [2019-10-15 03:25:07,592 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 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 03:25:07,728 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:25:07,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:07,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 03:25:07,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:07,794 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:07,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113493964] [2019-10-15 03:25:07,908 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:07,908 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:07,910 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:07,911 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:07,911 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:07,933 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:09,569 INFO L199 IcfgInterpreter]: Interpreting procedure max with input of size 1 for LOIs [2019-10-15 03:25:09,595 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:09,599 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:10,023 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:10,024 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 11] total 29 [2019-10-15 03:25:10,024 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208503315] [2019-10-15 03:25:10,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-15 03:25:10,025 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:10,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-15 03:25:10,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2019-10-15 03:25:10,026 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 30 states. [2019-10-15 03:25:11,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:11,299 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2019-10-15 03:25:11,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-15 03:25:11,299 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 42 [2019-10-15 03:25:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:11,301 INFO L225 Difference]: With dead ends: 55 [2019-10-15 03:25:11,301 INFO L226 Difference]: Without dead ends: 37 [2019-10-15 03:25:11,303 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=445, Invalid=2525, Unknown=0, NotChecked=0, Total=2970 [2019-10-15 03:25:11,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-15 03:25:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-15 03:25:11,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 03:25:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-10-15 03:25:11,319 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 42 [2019-10-15 03:25:11,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:11,322 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-10-15 03:25:11,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-15 03:25:11,322 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-10-15 03:25:11,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-15 03:25:11,323 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:11,323 INFO L380 BasicCegarLoop]: trace histogram [15, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:11,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:11,524 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:11,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:11,524 INFO L82 PathProgramCache]: Analyzing trace with hash -431924951, now seen corresponding path program 4 times [2019-10-15 03:25:11,525 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:11,525 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558400717] [2019-10-15 03:25:11,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:11,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:11,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 37 proven. 52 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-15 03:25:11,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558400717] [2019-10-15 03:25:11,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055617526] [2019-10-15 03:25:11,673 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 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 [2019-10-15 03:25:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:11,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 03:25:11,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-10-15 03:25:11,988 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-10-15 03:25:12,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987145328] [2019-10-15 03:25:12,293 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:12,294 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:12,294 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:12,294 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:12,295 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:12,321 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:13,625 INFO L199 IcfgInterpreter]: Interpreting procedure max with input of size 1 for LOIs [2019-10-15 03:25:13,650 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:13,653 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:14,088 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:14,089 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 15, 11] total 44 [2019-10-15 03:25:14,089 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761634724] [2019-10-15 03:25:14,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-10-15 03:25:14,091 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:14,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-10-15 03:25:14,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1545, Unknown=0, NotChecked=0, Total=1980 [2019-10-15 03:25:14,093 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 45 states. [2019-10-15 03:25:16,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:16,104 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2019-10-15 03:25:16,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-15 03:25:16,105 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2019-10-15 03:25:16,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:16,107 INFO L225 Difference]: With dead ends: 71 [2019-10-15 03:25:16,107 INFO L226 Difference]: Without dead ends: 52 [2019-10-15 03:25:16,110 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1333, Invalid=5807, Unknown=0, NotChecked=0, Total=7140 [2019-10-15 03:25:16,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-15 03:25:16,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-15 03:25:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-15 03:25:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2019-10-15 03:25:16,119 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 52 [2019-10-15 03:25:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:16,120 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2019-10-15 03:25:16,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-10-15 03:25:16,120 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2019-10-15 03:25:16,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-15 03:25:16,121 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:16,121 INFO L380 BasicCegarLoop]: trace histogram [26, 18, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:16,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:16,326 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:16,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:16,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1392966237, now seen corresponding path program 5 times [2019-10-15 03:25:16,327 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:16,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711188124] [2019-10-15 03:25:16,327 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:16,327 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:16,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2019-10-15 03:25:16,744 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711188124] [2019-10-15 03:25:16,744 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793268804] [2019-10-15 03:25:16,744 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:16,938 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:25:16,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:16,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:16,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 102 proven. 1 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-10-15 03:25:17,013 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2019-10-15 03:25:17,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [895456531] [2019-10-15 03:25:17,064 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:17,064 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:17,064 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:17,065 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:17,065 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:17,081 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:18,378 INFO L199 IcfgInterpreter]: Interpreting procedure max with input of size 1 for LOIs [2019-10-15 03:25:18,397 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:18,399 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:19,061 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:19,062 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 11] total 43 [2019-10-15 03:25:19,062 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985594625] [2019-10-15 03:25:19,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-15 03:25:19,063 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:19,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-15 03:25:19,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 03:25:19,065 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 44 states. [2019-10-15 03:25:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:21,039 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2019-10-15 03:25:21,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-15 03:25:21,039 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 69 [2019-10-15 03:25:21,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:21,041 INFO L225 Difference]: With dead ends: 76 [2019-10-15 03:25:21,041 INFO L226 Difference]: Without dead ends: 56 [2019-10-15 03:25:21,043 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1349, Invalid=5457, Unknown=0, NotChecked=0, Total=6806 [2019-10-15 03:25:21,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-15 03:25:21,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-15 03:25:21,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-15 03:25:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2019-10-15 03:25:21,052 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 69 [2019-10-15 03:25:21,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:21,053 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2019-10-15 03:25:21,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-15 03:25:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2019-10-15 03:25:21,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-15 03:25:21,054 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:21,055 INFO L380 BasicCegarLoop]: trace histogram [27, 18, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:21,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:21,259 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:21,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:21,260 INFO L82 PathProgramCache]: Analyzing trace with hash -127838474, now seen corresponding path program 6 times [2019-10-15 03:25:21,260 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:21,260 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517295056] [2019-10-15 03:25:21,260 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:21,261 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:21,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-10-15 03:25:21,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517295056] [2019-10-15 03:25:21,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218377282] [2019-10-15 03:25:21,697 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:21,930 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:25:21,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:21,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 03:25:21,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-10-15 03:25:21,960 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-10-15 03:25:22,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1281186897] [2019-10-15 03:25:22,623 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:22,624 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:22,624 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:22,624 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:22,625 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:22,643 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:23,928 INFO L199 IcfgInterpreter]: Interpreting procedure max with input of size 1 for LOIs [2019-10-15 03:25:23,951 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:23,953 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:24,416 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:24,416 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 53 [2019-10-15 03:25:24,416 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501013802] [2019-10-15 03:25:24,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-10-15 03:25:24,418 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:24,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-10-15 03:25:24,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=932, Invalid=1930, Unknown=0, NotChecked=0, Total=2862 [2019-10-15 03:25:24,420 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 54 states. [2019-10-15 03:25:30,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:30,828 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2019-10-15 03:25:30,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-15 03:25:30,829 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 73 [2019-10-15 03:25:30,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:30,829 INFO L225 Difference]: With dead ends: 92 [2019-10-15 03:25:30,830 INFO L226 Difference]: Without dead ends: 69 [2019-10-15 03:25:30,833 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 183 SyntacticMatches, 16 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2497 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2707, Invalid=7595, Unknown=0, NotChecked=0, Total=10302 [2019-10-15 03:25:30,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-15 03:25:30,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-10-15 03:25:30,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-15 03:25:30,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-10-15 03:25:30,841 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 73 [2019-10-15 03:25:30,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:30,841 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-10-15 03:25:30,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-10-15 03:25:30,841 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-10-15 03:25:30,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 03:25:30,843 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:30,843 INFO L380 BasicCegarLoop]: trace histogram [40, 18, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:31,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:31,047 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:31,047 INFO L82 PathProgramCache]: Analyzing trace with hash -381770835, now seen corresponding path program 7 times [2019-10-15 03:25:31,047 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:31,047 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817087233] [2019-10-15 03:25:31,048 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:31,048 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:31,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 50 proven. 71 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-10-15 03:25:31,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817087233] [2019-10-15 03:25:31,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673984395] [2019-10-15 03:25:31,171 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:31,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 03:25:31,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-10-15 03:25:31,450 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-10-15 03:25:31,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1910296991] [2019-10-15 03:25:31,557 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:31,557 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:31,558 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:31,558 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:31,558 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:31,572 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:32,860 INFO L199 IcfgInterpreter]: Interpreting procedure max with input of size 1 for LOIs [2019-10-15 03:25:32,878 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:32,881 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:33,205 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:33,205 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 11] total 27 [2019-10-15 03:25:33,206 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142366267] [2019-10-15 03:25:33,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-15 03:25:33,207 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:33,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-15 03:25:33,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2019-10-15 03:25:33,208 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 28 states. [2019-10-15 03:25:34,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:34,351 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2019-10-15 03:25:34,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-15 03:25:34,351 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 86 [2019-10-15 03:25:34,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:34,353 INFO L225 Difference]: With dead ends: 99 [2019-10-15 03:25:34,353 INFO L226 Difference]: Without dead ends: 77 [2019-10-15 03:25:34,355 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=543, Invalid=1907, Unknown=0, NotChecked=0, Total=2450 [2019-10-15 03:25:34,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-15 03:25:34,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-10-15 03:25:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-15 03:25:34,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-10-15 03:25:34,366 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 86 [2019-10-15 03:25:34,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:34,366 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-10-15 03:25:34,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-15 03:25:34,366 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-10-15 03:25:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-15 03:25:34,368 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:34,369 INFO L380 BasicCegarLoop]: trace histogram [42, 40, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]