java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_compareModified_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:31:57,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:31:57,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:31:57,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:31:57,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:31:57,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:31:57,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:31:57,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:31:57,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:31:57,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:31:57,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:31:57,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:31:57,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:31:57,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:31:57,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:31:57,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:31:57,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:31:57,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:31:57,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:31:57,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:31:57,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:31:57,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:31:57,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:31:57,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:31:57,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:31:57,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:31:57,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:31:57,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:31:57,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:31:57,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:31:57,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:31:57,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:31:57,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:31:57,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:31:57,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:31:57,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:31:57,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:31:57,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:31:57,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:31:57,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:31:57,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:31:57,250 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 01:31:57,282 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:31:57,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:31:57,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:31:57,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:31:57,287 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:31:57,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:31:57,287 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:31:57,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:31:57,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:31:57,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:31:57,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:31:57,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:31:57,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:31:57,292 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:31:57,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:31:57,292 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:31:57,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:31:57,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:31:57,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:31:57,293 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:31:57,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:31:57,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:57,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:31:57,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:31:57,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:31:57,296 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:31:57,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:31:57,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:31:57,297 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 01:31:57,575 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:31:57,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:31:57,591 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:31:57,593 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:31:57,593 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:31:57,594 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2019-10-15 01:31:57,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0d3d3f06/cd05516d33b74f46ae6bc6a35a955d8b/FLAGb35cfaf87 [2019-10-15 01:31:58,096 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:31:58,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2019-10-15 01:31:58,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0d3d3f06/cd05516d33b74f46ae6bc6a35a955d8b/FLAGb35cfaf87 [2019-10-15 01:31:58,483 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0d3d3f06/cd05516d33b74f46ae6bc6a35a955d8b [2019-10-15 01:31:58,493 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:31:58,495 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:31:58,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:58,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:31:58,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:31:58,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:58" (1/1) ... [2019-10-15 01:31:58,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@354e775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:58, skipping insertion in model container [2019-10-15 01:31:58,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:58" (1/1) ... [2019-10-15 01:31:58,511 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:31:58,534 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:31:58,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:58,740 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:31:58,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:58,869 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:31:58,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:58 WrapperNode [2019-10-15 01:31:58,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:58,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:31:58,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:31:58,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:31:58,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:58" (1/1) ... [2019-10-15 01:31:58,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:58" (1/1) ... [2019-10-15 01:31:58,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:58" (1/1) ... [2019-10-15 01:31:58,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:58" (1/1) ... [2019-10-15 01:31:58,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:58" (1/1) ... [2019-10-15 01:31:58,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:58" (1/1) ... [2019-10-15 01:31:58,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:58" (1/1) ... [2019-10-15 01:31:58,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:31:58,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:31:58,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:31:58,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:31:58,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:58" (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 01:31:58,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:31:58,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:31:58,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:31:58,991 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:31:58,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:31:58,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:31:58,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:31:58,991 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:31:58,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:31:58,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:31:58,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:31:58,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:31:58,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:31:58,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:31:59,421 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:31:59,421 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 01:31:59,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:59 BoogieIcfgContainer [2019-10-15 01:31:59,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:31:59,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:31:59,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:31:59,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:31:59,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:31:58" (1/3) ... [2019-10-15 01:31:59,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4686a699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:59, skipping insertion in model container [2019-10-15 01:31:59,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:58" (2/3) ... [2019-10-15 01:31:59,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4686a699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:59, skipping insertion in model container [2019-10-15 01:31:59,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:59" (3/3) ... [2019-10-15 01:31:59,430 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_compareModified_ground.i [2019-10-15 01:31:59,439 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:31:59,447 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:31:59,456 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:31:59,477 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:31:59,477 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:31:59,477 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:31:59,477 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:31:59,478 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:31:59,478 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:31:59,478 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:31:59,478 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:31:59,492 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-15 01:31:59,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:31:59,499 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:59,500 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:59,502 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:59,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:59,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1944584681, now seen corresponding path program 1 times [2019-10-15 01:31:59,514 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:59,514 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719885465] [2019-10-15 01:31:59,515 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:59,515 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:59,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:59,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719885465] [2019-10-15 01:31:59,702 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:59,702 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:59,703 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196849422] [2019-10-15 01:31:59,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:59,708 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:59,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:59,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:59,727 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-10-15 01:31:59,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:59,777 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2019-10-15 01:31:59,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:59,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:31:59,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:59,792 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:31:59,792 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:31:59,796 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 01:31:59,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:31:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 01:31:59,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:31:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2019-10-15 01:31:59,848 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2019-10-15 01:31:59,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:59,849 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2019-10-15 01:31:59,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:59,849 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2019-10-15 01:31:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:31:59,850 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:59,851 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:59,851 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:59,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:59,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1263030727, now seen corresponding path program 1 times [2019-10-15 01:31:59,852 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:59,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705854326] [2019-10-15 01:31:59,853 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:59,853 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:59,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:59,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705854326] [2019-10-15 01:31:59,929 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:59,929 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:59,930 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5729596] [2019-10-15 01:31:59,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:59,932 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:59,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:59,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:59,932 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 3 states. [2019-10-15 01:31:59,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:59,946 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2019-10-15 01:31:59,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:59,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-15 01:31:59,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:59,948 INFO L225 Difference]: With dead ends: 37 [2019-10-15 01:31:59,948 INFO L226 Difference]: Without dead ends: 23 [2019-10-15 01:31:59,950 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 01:31:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-15 01:31:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-15 01:31:59,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-15 01:31:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2019-10-15 01:31:59,957 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2019-10-15 01:31:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:59,957 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2019-10-15 01:31:59,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2019-10-15 01:31:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:31:59,959 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:59,959 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:59,959 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:59,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:59,960 INFO L82 PathProgramCache]: Analyzing trace with hash 404770879, now seen corresponding path program 1 times [2019-10-15 01:31:59,960 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:59,961 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390099459] [2019-10-15 01:31:59,961 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:59,961 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:59,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:32:00,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390099459] [2019-10-15 01:32:00,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487936799] [2019-10-15 01:32:00,080 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 01:32:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:00,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:32:00,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:32:00,197 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:32:00,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127320239] [2019-10-15 01:32:00,287 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:00,287 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:00,294 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:00,302 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:00,304 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:00,553 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:04,971 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2019-10-15 01:32:05,154 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:05,176 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:05,185 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:05,538 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:05,538 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 12] total 19 [2019-10-15 01:32:05,539 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432198551] [2019-10-15 01:32:05,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 01:32:05,540 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:05,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 01:32:05,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:32:05,542 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 19 states. [2019-10-15 01:32:06,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:06,360 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2019-10-15 01:32:06,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 01:32:06,361 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2019-10-15 01:32:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:06,363 INFO L225 Difference]: With dead ends: 52 [2019-10-15 01:32:06,363 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 01:32:06,364 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 01:32:06,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 01:32:06,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-10-15 01:32:06,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 01:32:06,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-10-15 01:32:06,374 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 15 [2019-10-15 01:32:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:06,374 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-10-15 01:32:06,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 01:32:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-10-15 01:32:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:32:06,375 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:06,375 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:06,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:06,583 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:06,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:06,584 INFO L82 PathProgramCache]: Analyzing trace with hash 251815191, now seen corresponding path program 2 times [2019-10-15 01:32:06,584 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:06,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835315042] [2019-10-15 01:32:06,585 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:06,585 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:06,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:32:06,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835315042] [2019-10-15 01:32:06,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441608857] [2019-10-15 01:32:06,679 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:06,733 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:32:06,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:06,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:32:06,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:32:06,754 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:32:06,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1886695285] [2019-10-15 01:32:06,788 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:06,788 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:06,789 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:06,789 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:06,789 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:06,820 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:07,231 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:07,250 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:07,262 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:07,623 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:07,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 12] total 20 [2019-10-15 01:32:07,624 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872795256] [2019-10-15 01:32:07,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-15 01:32:07,625 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:07,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-15 01:32:07,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2019-10-15 01:32:07,626 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 20 states. [2019-10-15 01:32:08,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:08,300 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2019-10-15 01:32:08,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 01:32:08,301 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2019-10-15 01:32:08,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:08,302 INFO L225 Difference]: With dead ends: 60 [2019-10-15 01:32:08,302 INFO L226 Difference]: Without dead ends: 40 [2019-10-15 01:32:08,304 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:32:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-15 01:32:08,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2019-10-15 01:32:08,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 01:32:08,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2019-10-15 01:32:08,320 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 19 [2019-10-15 01:32:08,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:08,321 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2019-10-15 01:32:08,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-15 01:32:08,321 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2019-10-15 01:32:08,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 01:32:08,323 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:08,323 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:08,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:08,529 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:08,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:08,529 INFO L82 PathProgramCache]: Analyzing trace with hash 661658391, now seen corresponding path program 3 times [2019-10-15 01:32:08,530 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:08,530 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387836631] [2019-10-15 01:32:08,531 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:08,531 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:08,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:32:08,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387836631] [2019-10-15 01:32:08,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617608338] [2019-10-15 01:32:08,691 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:08,775 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:08,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:08,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:32:08,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:32:08,832 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:32:08,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1235534021] [2019-10-15 01:32:08,906 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:08,907 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:08,907 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:08,907 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:08,908 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:08,944 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:09,308 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:09,317 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:09,321 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:09,743 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:09,744 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7, 12] total 30 [2019-10-15 01:32:09,744 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135464507] [2019-10-15 01:32:09,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-15 01:32:09,745 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:09,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-15 01:32:09,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2019-10-15 01:32:09,747 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 30 states. [2019-10-15 01:32:10,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:10,997 INFO L93 Difference]: Finished difference Result 74 states and 91 transitions. [2019-10-15 01:32:10,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-15 01:32:10,998 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 23 [2019-10-15 01:32:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:11,000 INFO L225 Difference]: With dead ends: 74 [2019-10-15 01:32:11,000 INFO L226 Difference]: Without dead ends: 47 [2019-10-15 01:32:11,002 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=504, Invalid=2576, Unknown=0, NotChecked=0, Total=3080 [2019-10-15 01:32:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-15 01:32:11,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-10-15 01:32:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-15 01:32:11,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-10-15 01:32:11,018 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 23 [2019-10-15 01:32:11,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:11,018 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-10-15 01:32:11,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-15 01:32:11,019 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-10-15 01:32:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-15 01:32:11,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:11,021 INFO L380 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:11,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:11,222 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:11,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:11,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1459515665, now seen corresponding path program 4 times [2019-10-15 01:32:11,223 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:11,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218005238] [2019-10-15 01:32:11,224 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:11,224 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:11,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:32:11,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218005238] [2019-10-15 01:32:11,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643235152] [2019-10-15 01:32:11,415 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:11,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:32:11,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-15 01:32:11,643 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-15 01:32:11,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2102612964] [2019-10-15 01:32:11,942 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:11,943 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:11,943 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:11,943 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:11,944 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:11,985 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:12,331 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:12,338 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:12,342 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:12,818 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:12,819 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13, 12] total 43 [2019-10-15 01:32:12,819 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582960260] [2019-10-15 01:32:12,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-15 01:32:12,821 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:12,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-15 01:32:12,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2019-10-15 01:32:12,822 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 43 states. [2019-10-15 01:32:14,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:14,601 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2019-10-15 01:32:14,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-15 01:32:14,604 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 30 [2019-10-15 01:32:14,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:14,605 INFO L225 Difference]: With dead ends: 88 [2019-10-15 01:32:14,606 INFO L226 Difference]: Without dead ends: 60 [2019-10-15 01:32:14,608 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1706 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1282, Invalid=5360, Unknown=0, NotChecked=0, Total=6642 [2019-10-15 01:32:14,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-15 01:32:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2019-10-15 01:32:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-15 01:32:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2019-10-15 01:32:14,619 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 30 [2019-10-15 01:32:14,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:14,619 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2019-10-15 01:32:14,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-15 01:32:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2019-10-15 01:32:14,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 01:32:14,621 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:14,621 INFO L380 BasicCegarLoop]: trace histogram [22, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:14,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:14,825 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:14,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:14,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1397621737, now seen corresponding path program 5 times [2019-10-15 01:32:14,826 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:14,827 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449631872] [2019-10-15 01:32:14,827 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:14,827 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:14,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:32:15,067 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449631872] [2019-10-15 01:32:15,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69544487] [2019-10-15 01:32:15,068 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:15,596 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-15 01:32:15,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:15,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-15 01:32:15,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:32:15,618 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:32:15,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1207180924] [2019-10-15 01:32:15,801 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:15,802 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:15,802 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:15,802 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:15,803 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:15,838 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:16,158 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:16,165 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:16,168 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:16,557 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:16,558 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 12] total 32 [2019-10-15 01:32:16,558 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156925388] [2019-10-15 01:32:16,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-15 01:32:16,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:16,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-15 01:32:16,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:32:16,561 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 32 states. [2019-10-15 01:32:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:17,711 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2019-10-15 01:32:17,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-15 01:32:17,712 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 43 [2019-10-15 01:32:17,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:17,713 INFO L225 Difference]: With dead ends: 90 [2019-10-15 01:32:17,713 INFO L226 Difference]: Without dead ends: 70 [2019-10-15 01:32:17,717 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=746, Invalid=2676, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:32:17,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-15 01:32:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2019-10-15 01:32:17,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-15 01:32:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2019-10-15 01:32:17,733 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 43 [2019-10-15 01:32:17,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:17,733 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2019-10-15 01:32:17,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-15 01:32:17,734 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2019-10-15 01:32:17,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-15 01:32:17,737 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:17,737 INFO L380 BasicCegarLoop]: trace histogram [22, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:17,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:17,940 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:17,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:17,941 INFO L82 PathProgramCache]: Analyzing trace with hash -858856681, now seen corresponding path program 6 times [2019-10-15 01:32:17,941 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:17,941 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287663931] [2019-10-15 01:32:17,942 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:17,942 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:17,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:32:18,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287663931] [2019-10-15 01:32:18,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385475446] [2019-10-15 01:32:18,355 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 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 01:32:18,511 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:18,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:18,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:32:18,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-10-15 01:32:19,116 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-10-15 01:32:20,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [908528315] [2019-10-15 01:32:20,308 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:20,309 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:20,309 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:20,309 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:20,310 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:20,330 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:20,634 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:20,640 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:20,643 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:21,240 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:21,240 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 25, 12] total 78 [2019-10-15 01:32:21,241 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858522266] [2019-10-15 01:32:21,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-10-15 01:32:21,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:21,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-10-15 01:32:21,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1371, Invalid=4635, Unknown=0, NotChecked=0, Total=6006 [2019-10-15 01:32:21,245 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 78 states. [2019-10-15 01:32:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:25,578 INFO L93 Difference]: Finished difference Result 134 states and 169 transitions. [2019-10-15 01:32:25,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-10-15 01:32:25,578 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 53 [2019-10-15 01:32:25,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:25,580 INFO L225 Difference]: With dead ends: 134 [2019-10-15 01:32:25,580 INFO L226 Difference]: Without dead ends: 95 [2019-10-15 01:32:25,587 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5653 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=5088, Invalid=17864, Unknown=0, NotChecked=0, Total=22952 [2019-10-15 01:32:25,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-15 01:32:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2019-10-15 01:32:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-15 01:32:25,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2019-10-15 01:32:25,598 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 53 [2019-10-15 01:32:25,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:25,598 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2019-10-15 01:32:25,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-10-15 01:32:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2019-10-15 01:32:25,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-15 01:32:25,600 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:25,601 INFO L380 BasicCegarLoop]: trace histogram [46, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:25,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:25,815 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:25,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:25,815 INFO L82 PathProgramCache]: Analyzing trace with hash -2083364625, now seen corresponding path program 7 times [2019-10-15 01:32:25,815 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:25,815 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881046638] [2019-10-15 01:32:25,816 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:25,816 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:25,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:32:26,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881046638] [2019-10-15 01:32:26,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311669836] [2019-10-15 01:32:26,439 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 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 01:32:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:26,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 48 conjunts are in the unsatisfiable core [2019-10-15 01:32:26,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-15 01:32:28,825 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-15 01:32:33,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1524010091] [2019-10-15 01:32:33,207 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:33,207 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:33,207 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:33,208 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:33,208 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:33,234 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:33,542 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:33,553 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:33,556 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:34,261 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:34,261 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 49, 49, 12] total 127 [2019-10-15 01:32:34,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2498045] [2019-10-15 01:32:34,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 127 states [2019-10-15 01:32:34,264 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:34,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2019-10-15 01:32:34,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4824, Invalid=11178, Unknown=0, NotChecked=0, Total=16002 [2019-10-15 01:32:34,270 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand 127 states.