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-crafted/bor1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:29:40,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:29:40,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:29:40,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:29:40,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:29:40,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:29:40,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:29:40,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:29:40,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:29:40,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:29:40,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:29:40,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:29:40,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:29:40,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:29:40,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:29:40,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:29:40,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:29:40,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:29:40,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:29:40,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:29:40,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:29:40,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:29:40,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:29:40,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:29:40,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:29:40,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:29:40,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:29:40,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:29:40,989 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 01:29:41,003 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:29:41,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:29:41,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:29:41,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:29:41,006 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:29:41,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:29:41,009 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:29:41,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:29:41,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:29:41,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:29:41,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:29:41,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:29:41,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:29:41,011 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:29:41,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:29:41,011 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:29:41,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:29:41,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:29:41,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:29:41,012 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:29:41,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:29:41,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:29:41,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:29:41,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:29:41,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:29:41,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:29:41,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:29:41,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:29:41,015 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 01:29:41,323 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:29:41,336 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:29:41,340 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:29:41,341 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:29:41,342 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:29:41,342 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor1.i [2019-10-15 01:29:41,413 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbb4966cc/402ffb4f7b244df09cecb13843a62e92/FLAGa520bbed2 [2019-10-15 01:29:41,865 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:29:41,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor1.i [2019-10-15 01:29:41,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbb4966cc/402ffb4f7b244df09cecb13843a62e92/FLAGa520bbed2 [2019-10-15 01:29:42,256 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbb4966cc/402ffb4f7b244df09cecb13843a62e92 [2019-10-15 01:29:42,266 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:29:42,269 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:29:42,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:29:42,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:29:42,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:29:42,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@538e7e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42, skipping insertion in model container [2019-10-15 01:29:42,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,286 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:29:42,312 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:29:42,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:29:42,519 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:29:42,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:29:42,649 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:29:42,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42 WrapperNode [2019-10-15 01:29:42,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:29:42,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:29:42,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:29:42,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:29:42,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (1/1) ... [2019-10-15 01:29:42,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:29:42,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:29:42,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:29:42,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:29:42,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (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 01:29:42,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:29:42,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:29:42,751 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2019-10-15 01:29:42,751 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:29:42,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:29:42,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:29:42,752 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2019-10-15 01:29:42,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:29:42,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:29:42,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:29:42,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:29:42,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:29:42,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:29:42,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:29:43,142 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:29:43,143 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:29:43,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:29:43 BoogieIcfgContainer [2019-10-15 01:29:43,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:29:43,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:29:43,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:29:43,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:29:43,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:29:42" (1/3) ... [2019-10-15 01:29:43,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b2ec48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:29:43, skipping insertion in model container [2019-10-15 01:29:43,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:29:42" (2/3) ... [2019-10-15 01:29:43,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b2ec48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:29:43, skipping insertion in model container [2019-10-15 01:29:43,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:29:43" (3/3) ... [2019-10-15 01:29:43,152 INFO L109 eAbstractionObserver]: Analyzing ICFG bor1.i [2019-10-15 01:29:43,166 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:29:43,172 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:29:43,183 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:29:43,205 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:29:43,205 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:29:43,205 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:29:43,206 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:29:43,206 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:29:43,206 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:29:43,206 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:29:43,206 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:29:43,223 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 01:29:43,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:29:43,229 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:43,230 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 01:29:43,232 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:43,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2002379581, now seen corresponding path program 1 times [2019-10-15 01:29:43,245 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:43,245 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195735873] [2019-10-15 01:29:43,246 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:43,246 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:43,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:43,436 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 01:29:43,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195735873] [2019-10-15 01:29:43,438 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:29:43,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:29:43,440 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455830116] [2019-10-15 01:29:43,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:29:43,446 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:29:43,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:29:43,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:29:43,464 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 01:29:43,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:29:43,515 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 01:29:43,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:29:43,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 01:29:43,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:29:43,534 INFO L225 Difference]: With dead ends: 41 [2019-10-15 01:29:43,534 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:29:43,542 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 01:29:43,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:29:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:29:43,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:29:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 01:29:43,613 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 01:29:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:29:43,615 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 01:29:43,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:29:43,616 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 01:29:43,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:29:43,620 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:43,621 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 01:29:43,621 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:43,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1232729663, now seen corresponding path program 1 times [2019-10-15 01:29:43,622 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:43,623 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280176749] [2019-10-15 01:29:43,623 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:43,623 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:43,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:43,750 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 01:29:43,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280176749] [2019-10-15 01:29:43,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353330568] [2019-10-15 01:29:43,751 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 01:29:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:43,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:29:43,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:29:43,932 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 01:29:43,932 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:29:44,012 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 01:29:44,012 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:29:44,012 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 01:29:44,013 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473449139] [2019-10-15 01:29:44,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:29:44,015 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:29:44,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:29:44,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:29:44,015 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 01:29:44,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:29:44,028 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 01:29:44,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:29:44,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 01:29:44,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:29:44,032 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:29:44,032 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:29:44,034 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 01:29:44,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:29:44,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 01:29:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:29:44,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 01:29:44,041 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 01:29:44,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:29:44,041 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 01:29:44,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:29:44,041 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 01:29:44,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:29:44,042 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:44,043 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 01:29:44,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:29:44,247 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:44,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:44,248 INFO L82 PathProgramCache]: Analyzing trace with hash 638962104, now seen corresponding path program 1 times [2019-10-15 01:29:44,249 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:44,249 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154580101] [2019-10-15 01:29:44,251 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:44,252 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:44,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:44,380 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 01:29:44,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154580101] [2019-10-15 01:29:44,382 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:29:44,382 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:29:44,383 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837506325] [2019-10-15 01:29:44,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:29:44,384 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:29:44,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:29:44,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:29:44,385 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 01:29:44,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:29:44,402 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 01:29:44,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:29:44,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 01:29:44,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:29:44,405 INFO L225 Difference]: With dead ends: 31 [2019-10-15 01:29:44,405 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:29:44,406 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 01:29:44,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:29:44,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 01:29:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:29:44,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 01:29:44,416 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 01:29:44,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:29:44,419 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 01:29:44,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:29:44,419 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 01:29:44,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 01:29:44,421 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:44,421 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 01:29:44,422 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:44,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:44,422 INFO L82 PathProgramCache]: Analyzing trace with hash -454929733, now seen corresponding path program 1 times [2019-10-15 01:29:44,423 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:44,423 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252135438] [2019-10-15 01:29:44,423 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:44,423 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:44,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:44,537 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 01:29:44,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252135438] [2019-10-15 01:29:44,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300768467] [2019-10-15 01:29:44,538 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 01:29:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:44,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:29:44,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:29:44,656 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 01:29:44,657 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:29:44,695 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 01:29:44,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952335567] [2019-10-15 01:29:44,725 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:29:44,726 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:29:44,731 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:29:44,742 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:29:44,743 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:29:44,879 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:29:47,072 INFO L199 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-10-15 01:29:47,134 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:29:47,139 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:29:47,523 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:29:47,524 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:29:47,524 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061882451] [2019-10-15 01:29:47,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:29:47,526 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:29:47,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:29:47,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:29:47,527 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2019-10-15 01:29:48,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:29:48,200 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-15 01:29:48,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 01:29:48,203 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-10-15 01:29:48,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:29:48,204 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:29:48,204 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 01:29:48,205 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 01:29:48,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 01:29:48,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 01:29:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:29:48,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-15 01:29:48,218 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-10-15 01:29:48,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:29:48,219 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-15 01:29:48,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:29:48,220 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-15 01:29:48,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:29:48,221 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:48,221 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 01:29:48,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:29:48,432 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:48,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:48,433 INFO L82 PathProgramCache]: Analyzing trace with hash 545849657, now seen corresponding path program 2 times [2019-10-15 01:29:48,433 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:48,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890603416] [2019-10-15 01:29:48,433 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:48,433 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:48,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:48,533 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 01:29:48,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890603416] [2019-10-15 01:29:48,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3628265] [2019-10-15 01:29:48,534 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 01:29:48,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:29:48,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:29:48,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:29:48,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:29:48,650 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 01:29:48,651 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:29:48,685 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 01:29:48,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1859922156] [2019-10-15 01:29:48,688 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:29:48,689 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:29:48,689 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:29:48,690 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:29:48,690 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:29:48,720 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:29:50,202 INFO L199 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-10-15 01:29:50,236 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:29:50,241 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:29:50,729 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:29:50,730 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 11] total 21 [2019-10-15 01:29:50,730 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340566953] [2019-10-15 01:29:50,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:29:50,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:29:50,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:29:50,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:29:50,735 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 22 states. [2019-10-15 01:29:51,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:29:51,668 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-10-15 01:29:51,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:29:51,668 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2019-10-15 01:29:51,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:29:51,669 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:29:51,669 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 01:29:51,670 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:29:51,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 01:29:51,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-15 01:29:51,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 01:29:51,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-15 01:29:51,677 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-10-15 01:29:51,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:29:51,678 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-15 01:29:51,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:29:51,678 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-15 01:29:51,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 01:29:51,679 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:51,679 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 01:29:51,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:29:51,884 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:51,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:51,884 INFO L82 PathProgramCache]: Analyzing trace with hash -633329328, now seen corresponding path program 3 times [2019-10-15 01:29:51,885 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:51,885 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539594774] [2019-10-15 01:29:51,885 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:51,885 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:51,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:51,975 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 01:29:51,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539594774] [2019-10-15 01:29:51,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933363726] [2019-10-15 01:29:51,976 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 01:29:52,082 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:29:52,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:29:52,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:29:52,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:29:52,096 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 01:29:52,096 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:29:52,183 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 01:29:52,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2115021561] [2019-10-15 01:29:52,186 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:29:52,186 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:29:52,187 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:29:52,187 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:29:52,187 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:29:52,211 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:29:53,853 INFO L199 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-10-15 01:29:53,875 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:29:53,878 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:29:54,218 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:29:54,218 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 01:29:54,219 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767687364] [2019-10-15 01:29:54,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 01:29:54,220 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:29:54,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 01:29:54,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2019-10-15 01:29:54,221 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 26 states. [2019-10-15 01:29:57,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:29:57,190 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-10-15 01:29:57,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 01:29:57,190 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2019-10-15 01:29:57,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:29:57,192 INFO L225 Difference]: With dead ends: 54 [2019-10-15 01:29:57,193 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 01:29:57,195 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2019-10-15 01:29:57,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 01:29:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-15 01:29:57,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 01:29:57,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-15 01:29:57,210 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-10-15 01:29:57,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:29:57,210 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-15 01:29:57,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 01:29:57,210 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-15 01:29:57,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 01:29:57,214 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:29:57,214 INFO L380 BasicCegarLoop]: trace histogram [12, 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 01:29:57,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:29:57,418 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:29:57,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:29:57,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1897195758, now seen corresponding path program 4 times [2019-10-15 01:29:57,419 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:29:57,419 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401131798] [2019-10-15 01:29:57,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:57,420 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:29:57,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:29:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:29:57,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401131798] [2019-10-15 01:29:57,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463353572] [2019-10-15 01:29:57,621 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 01:29:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:29:57,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:29:57,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:29:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:29:57,800 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:29:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:29:58,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [387189873] [2019-10-15 01:29:58,083 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:29:58,083 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:29:58,084 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:29:58,084 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:29:58,084 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:29:58,101 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:29:59,333 INFO L199 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-10-15 01:29:59,355 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:29:59,359 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:29:59,795 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:29:59,796 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-15 01:29:59,796 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099940341] [2019-10-15 01:29:59,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-15 01:29:59,797 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:29:59,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-15 01:29:59,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1125, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:29:59,802 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 40 states. [2019-10-15 01:30:01,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:01,329 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2019-10-15 01:30:01,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-15 01:30:01,329 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2019-10-15 01:30:01,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:01,330 INFO L225 Difference]: With dead ends: 68 [2019-10-15 01:30:01,330 INFO L226 Difference]: Without dead ends: 50 [2019-10-15 01:30:01,333 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1244, Invalid=4158, Unknown=0, NotChecked=0, Total=5402 [2019-10-15 01:30:01,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-15 01:30:01,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-15 01:30:01,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-15 01:30:01,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-10-15 01:30:01,342 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2019-10-15 01:30:01,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:01,342 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-10-15 01:30:01,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-15 01:30:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-10-15 01:30:01,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-15 01:30:01,344 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:01,344 INFO L380 BasicCegarLoop]: trace histogram [26, 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 01:30:01,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:01,548 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:01,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:01,549 INFO L82 PathProgramCache]: Analyzing trace with hash -755090094, now seen corresponding path program 5 times [2019-10-15 01:30:01,549 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:01,549 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473564086] [2019-10-15 01:30:01,549 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:01,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:01,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:30:02,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473564086] [2019-10-15 01:30:02,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465935898] [2019-10-15 01:30:02,001 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 01:30:02,162 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:30:02,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:02,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:30:02,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-10-15 01:30:02,221 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2019-10-15 01:30:02,301 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1031726498] [2019-10-15 01:30:02,302 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:02,303 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:02,303 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:02,303 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:02,303 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:02,321 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:03,512 INFO L199 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-10-15 01:30:03,536 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:03,539 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:04,199 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:04,199 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 11] total 43 [2019-10-15 01:30:04,200 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570792680] [2019-10-15 01:30:04,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-15 01:30:04,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:04,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-15 01:30:04,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:30:04,205 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 44 states. [2019-10-15 01:30:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:06,361 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-10-15 01:30:06,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-15 01:30:06,361 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 63 [2019-10-15 01:30:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:06,362 INFO L225 Difference]: With dead ends: 72 [2019-10-15 01:30:06,362 INFO L226 Difference]: Without dead ends: 54 [2019-10-15 01:30:06,365 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1349, Invalid=5457, Unknown=0, NotChecked=0, Total=6806 [2019-10-15 01:30:06,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-15 01:30:06,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-15 01:30:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-15 01:30:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-10-15 01:30:06,374 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2019-10-15 01:30:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:06,375 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-10-15 01:30:06,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-15 01:30:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-10-15 01:30:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-15 01:30:06,376 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:06,376 INFO L380 BasicCegarLoop]: trace histogram [27, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:30:06,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:06,587 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:06,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:06,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1616126463, now seen corresponding path program 6 times [2019-10-15 01:30:06,588 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:06,588 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217421337] [2019-10-15 01:30:06,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:06,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:06,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:07,037 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217421337] [2019-10-15 01:30:07,037 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855102159] [2019-10-15 01:30:07,038 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 01:30:07,245 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:30:07,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:30:07,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 01:30:07,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:07,270 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:30:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:08,205 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1964580581] [2019-10-15 01:30:08,206 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:30:08,207 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:30:08,207 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:30:08,207 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:30:08,208 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:30:08,236 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:30:09,445 INFO L199 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-10-15 01:30:09,513 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:30:09,515 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:30:09,980 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:30:09,980 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 69 [2019-10-15 01:30:09,980 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533092739] [2019-10-15 01:30:09,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-10-15 01:30:09,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:30:09,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-10-15 01:30:09,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1740, Invalid=3090, Unknown=0, NotChecked=0, Total=4830 [2019-10-15 01:30:09,984 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 70 states. [2019-10-15 01:30:13,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:30:13,381 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2019-10-15 01:30:13,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-10-15 01:30:13,382 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 67 [2019-10-15 01:30:13,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:30:13,383 INFO L225 Difference]: With dead ends: 104 [2019-10-15 01:30:13,383 INFO L226 Difference]: Without dead ends: 83 [2019-10-15 01:30:13,388 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3929 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5099, Invalid=12723, Unknown=0, NotChecked=0, Total=17822 [2019-10-15 01:30:13,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-15 01:30:13,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-10-15 01:30:13,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-15 01:30:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-15 01:30:13,398 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 67 [2019-10-15 01:30:13,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:30:13,399 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-15 01:30:13,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-10-15 01:30:13,399 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-15 01:30:13,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-15 01:30:13,400 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:30:13,401 INFO L380 BasicCegarLoop]: trace histogram [56, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:30:13,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:30:13,605 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:30:13,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:30:13,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1754158397, now seen corresponding path program 7 times [2019-10-15 01:30:13,606 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:30:13,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694104628] [2019-10-15 01:30:13,607 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:13,607 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:30:13,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:30:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:15,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:15,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694104628] [2019-10-15 01:30:15,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361070856] [2019-10-15 01:30:15,049 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 01:30:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:30:15,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-15 01:30:15,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:30:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:30:15,340 INFO L321 TraceCheckSpWp]: Computing backward predicates...