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/sorting_bubblesort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:31:50,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:31:50,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:31:50,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:31:50,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:31:50,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:31:50,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:31:50,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:31:50,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:31:50,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:31:50,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:31:50,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:31:50,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:31:50,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:31:50,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:31:50,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:31:50,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:31:50,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:31:50,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:31:50,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:31:50,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:31:50,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:31:50,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:31:50,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:31:50,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:31:50,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:31:50,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:31:50,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:31:50,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:31:50,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:31:50,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:31:50,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:31:50,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:31:50,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:31:50,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:31:50,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:31:50,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:31:50,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:31:50,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:31:50,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:31:50,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:31:50,181 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 01:31:50,202 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:31:50,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:31:50,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:31:50,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:31:50,204 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:31:50,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:31:50,205 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:31:50,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:31:50,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:31:50,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:31:50,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:31:50,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:31:50,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:31:50,207 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:31:50,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:31:50,208 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:31:50,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:31:50,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:31:50,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:31:50,210 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:31:50,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:31:50,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:50,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:31:50,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:31:50,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:31:50,211 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:31:50,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:31:50,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:31:50,212 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 01:31:50,489 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:31:50,503 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:31:50,506 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:31:50,508 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:31:50,508 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:31:50,509 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i [2019-10-15 01:31:50,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/480601099/2c470c16a0ef46d280fbbdd5774db980/FLAG6c89505da [2019-10-15 01:31:51,056 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:31:51,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i [2019-10-15 01:31:51,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/480601099/2c470c16a0ef46d280fbbdd5774db980/FLAG6c89505da [2019-10-15 01:31:51,405 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/480601099/2c470c16a0ef46d280fbbdd5774db980 [2019-10-15 01:31:51,416 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:31:51,417 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:31:51,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:51,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:31:51,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:31:51,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:51" (1/1) ... [2019-10-15 01:31:51,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ee21c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:51, skipping insertion in model container [2019-10-15 01:31:51,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:51" (1/1) ... [2019-10-15 01:31:51,434 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:31:51,453 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:31:51,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:51,649 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:31:51,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:51,698 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:31:51,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:51 WrapperNode [2019-10-15 01:31:51,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:51,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:31:51,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:31:51,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:31:51,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:51" (1/1) ... [2019-10-15 01:31:51,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:51" (1/1) ... [2019-10-15 01:31:51,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:51" (1/1) ... [2019-10-15 01:31:51,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:51" (1/1) ... [2019-10-15 01:31:51,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:51" (1/1) ... [2019-10-15 01:31:51,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:51" (1/1) ... [2019-10-15 01:31:51,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:51" (1/1) ... [2019-10-15 01:31:51,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:31:51,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:31:51,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:31:51,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:31:51,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:51" (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 01:31:51,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:31:51,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:31:51,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:31:51,893 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:31:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:31:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:31:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:31:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:31:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:31:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:31:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:31:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:31:51,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:31:51,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:31:52,333 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:31:52,333 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-15 01:31:52,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:52 BoogieIcfgContainer [2019-10-15 01:31:52,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:31:52,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:31:52,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:31:52,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:31:52,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:31:51" (1/3) ... [2019-10-15 01:31:52,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa8d452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:52, skipping insertion in model container [2019-10-15 01:31:52,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:51" (2/3) ... [2019-10-15 01:31:52,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa8d452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:52, skipping insertion in model container [2019-10-15 01:31:52,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:52" (3/3) ... [2019-10-15 01:31:52,343 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-2.i [2019-10-15 01:31:52,351 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:31:52,358 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:31:52,369 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:31:52,390 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:31:52,390 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:31:52,390 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:31:52,390 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:31:52,390 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:31:52,390 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:31:52,390 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:31:52,391 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:31:52,406 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-15 01:31:52,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:31:52,412 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:52,414 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:52,416 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:52,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:52,421 INFO L82 PathProgramCache]: Analyzing trace with hash -573825775, now seen corresponding path program 1 times [2019-10-15 01:31:52,428 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:52,428 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103475168] [2019-10-15 01:31:52,429 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:52,429 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:52,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:52,586 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 01:31:52,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103475168] [2019-10-15 01:31:52,588 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:52,588 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:52,589 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231704362] [2019-10-15 01:31:52,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:52,594 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:52,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:52,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:52,609 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-10-15 01:31:52,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:52,647 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2019-10-15 01:31:52,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:52,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:31:52,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:52,659 INFO L225 Difference]: With dead ends: 37 [2019-10-15 01:31:52,660 INFO L226 Difference]: Without dead ends: 19 [2019-10-15 01:31:52,664 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 01:31:52,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-15 01:31:52,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-15 01:31:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 01:31:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-10-15 01:31:52,710 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2019-10-15 01:31:52,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:52,711 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-10-15 01:31:52,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:52,712 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-10-15 01:31:52,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:31:52,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:52,713 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:52,713 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:52,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:52,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1140036509, now seen corresponding path program 1 times [2019-10-15 01:31:52,714 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:52,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94247718] [2019-10-15 01:31:52,715 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:52,715 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:52,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:52,768 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 01:31:52,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94247718] [2019-10-15 01:31:52,769 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:52,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:52,769 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428803974] [2019-10-15 01:31:52,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:52,771 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:52,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:52,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:52,772 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 3 states. [2019-10-15 01:31:52,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:52,786 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2019-10-15 01:31:52,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:52,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-15 01:31:52,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:52,788 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:31:52,788 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:31:52,790 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 01:31:52,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:31:52,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:31:52,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:31:52,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 01:31:52,797 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2019-10-15 01:31:52,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:52,797 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 01:31:52,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:52,798 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 01:31:52,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:31:52,799 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:52,799 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:52,799 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:52,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:52,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1123124524, now seen corresponding path program 1 times [2019-10-15 01:31:52,800 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:52,800 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47829925] [2019-10-15 01:31:52,801 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:52,801 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:52,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:52,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47829925] [2019-10-15 01:31:52,865 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:52,865 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:52,865 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204515566] [2019-10-15 01:31:52,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:52,869 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:52,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:52,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:52,871 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 01:31:52,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:52,889 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-10-15 01:31:52,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:52,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-15 01:31:52,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:52,892 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:31:52,893 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:31:52,893 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 01:31:52,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:31:52,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 01:31:52,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:31:52,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 01:31:52,902 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 16 [2019-10-15 01:31:52,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:52,903 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 01:31:52,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:52,904 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 01:31:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:31:52,906 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:52,906 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:52,906 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:52,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:52,907 INFO L82 PathProgramCache]: Analyzing trace with hash -685002894, now seen corresponding path program 1 times [2019-10-15 01:31:52,907 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:52,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596358762] [2019-10-15 01:31:52,908 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:52,908 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:52,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:53,034 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596358762] [2019-10-15 01:31:53,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569611750] [2019-10-15 01:31:53,035 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 01:31:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:53,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:31:53,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:53,128 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:53,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1323670834] [2019-10-15 01:31:53,192 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:31:53,193 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:53,199 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:53,208 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:53,209 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:53,370 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:53,865 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:31:53,878 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:53,884 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:54,442 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:54,442 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 13] total 19 [2019-10-15 01:31:54,443 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275194915] [2019-10-15 01:31:54,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 01:31:54,445 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:54,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 01:31:54,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:31:54,446 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 19 states. [2019-10-15 01:31:55,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:55,238 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2019-10-15 01:31:55,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 01:31:55,239 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 17 [2019-10-15 01:31:55,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:55,245 INFO L225 Difference]: With dead ends: 51 [2019-10-15 01:31:55,245 INFO L226 Difference]: Without dead ends: 37 [2019-10-15 01:31:55,248 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 01:31:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-15 01:31:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-10-15 01:31:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:31:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-15 01:31:55,266 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2019-10-15 01:31:55,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:55,268 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-15 01:31:55,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 01:31:55,269 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-15 01:31:55,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:31:55,270 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:55,271 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:55,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:55,475 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:55,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:55,476 INFO L82 PathProgramCache]: Analyzing trace with hash -143319426, now seen corresponding path program 2 times [2019-10-15 01:31:55,476 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:55,477 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147864044] [2019-10-15 01:31:55,477 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:55,477 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:55,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:55,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147864044] [2019-10-15 01:31:55,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377123989] [2019-10-15 01:31:55,534 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 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 01:31:55,589 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:31:55,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:55,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:31:55,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:55,601 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:55,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [243300959] [2019-10-15 01:31:55,686 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:31:55,686 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:55,687 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:55,687 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:55,687 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:55,723 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:56,067 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:31:56,077 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:56,083 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:56,569 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:56,570 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 13] total 25 [2019-10-15 01:31:56,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967157010] [2019-10-15 01:31:56,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:31:56,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:56,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:31:56,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:31:56,573 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 25 states. [2019-10-15 01:31:57,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:57,557 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2019-10-15 01:31:57,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 01:31:57,562 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 20 [2019-10-15 01:31:57,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:57,563 INFO L225 Difference]: With dead ends: 59 [2019-10-15 01:31:57,563 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 01:31:57,564 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2019-10-15 01:31:57,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 01:31:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2019-10-15 01:31:57,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:31:57,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-15 01:31:57,572 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 20 [2019-10-15 01:31:57,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:57,573 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-15 01:31:57,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:31:57,573 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-15 01:31:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 01:31:57,574 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:57,574 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:57,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:57,787 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:57,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:57,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1928611330, now seen corresponding path program 3 times [2019-10-15 01:31:57,788 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:57,788 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343694273] [2019-10-15 01:31:57,788 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:57,788 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:57,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:57,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343694273] [2019-10-15 01:31:57,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021648687] [2019-10-15 01:31:57,948 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 01:31:58,025 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:31:58,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:58,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:31:58,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:58,052 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:58,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1216881201] [2019-10-15 01:31:58,258 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:31:58,259 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:58,259 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:58,259 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:58,260 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:58,281 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:58,451 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:31:58,472 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:58,478 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:58,943 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:58,944 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13] total 37 [2019-10-15 01:31:58,944 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885959986] [2019-10-15 01:31:58,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-15 01:31:58,946 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:58,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-15 01:31:58,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=993, Unknown=0, NotChecked=0, Total=1332 [2019-10-15 01:31:58,947 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 37 states. [2019-10-15 01:32:00,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:00,467 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2019-10-15 01:32:00,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-15 01:32:00,468 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 26 [2019-10-15 01:32:00,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:00,469 INFO L225 Difference]: With dead ends: 71 [2019-10-15 01:32:00,469 INFO L226 Difference]: Without dead ends: 55 [2019-10-15 01:32:00,471 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=974, Invalid=3718, Unknown=0, NotChecked=0, Total=4692 [2019-10-15 01:32:00,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-15 01:32:00,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2019-10-15 01:32:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-15 01:32:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-10-15 01:32:00,480 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 26 [2019-10-15 01:32:00,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:00,481 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-10-15 01:32:00,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-15 01:32:00,481 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-10-15 01:32:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-15 01:32:00,482 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:00,482 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:00,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:00,686 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:00,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1848185086, now seen corresponding path program 4 times [2019-10-15 01:32:00,687 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:00,687 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699109974] [2019-10-15 01:32:00,688 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:00,688 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:00,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:32:01,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699109974] [2019-10-15 01:32:01,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329161190] [2019-10-15 01:32:01,045 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 01:32:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:01,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:32:01,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:32:01,155 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:32:01,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [504855038] [2019-10-15 01:32:01,825 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:32:01,826 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:01,826 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:01,826 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:01,827 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:01,847 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:02,036 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:32:02,043 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:02,048 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:02,625 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:02,625 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 13] total 61 [2019-10-15 01:32:02,625 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071327516] [2019-10-15 01:32:02,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-10-15 01:32:02,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:02,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-10-15 01:32:02,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1215, Invalid=2445, Unknown=0, NotChecked=0, Total=3660 [2019-10-15 01:32:02,630 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 61 states. [2019-10-15 01:32:05,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:05,517 INFO L93 Difference]: Finished difference Result 95 states and 128 transitions. [2019-10-15 01:32:05,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-10-15 01:32:05,518 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 38 [2019-10-15 01:32:05,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:05,520 INFO L225 Difference]: With dead ends: 95 [2019-10-15 01:32:05,520 INFO L226 Difference]: Without dead ends: 79 [2019-10-15 01:32:05,524 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3227 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3554, Invalid=10018, Unknown=0, NotChecked=0, Total=13572 [2019-10-15 01:32:05,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-15 01:32:05,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2019-10-15 01:32:05,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-15 01:32:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2019-10-15 01:32:05,535 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 38 [2019-10-15 01:32:05,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:05,535 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2019-10-15 01:32:05,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-10-15 01:32:05,536 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2019-10-15 01:32:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-15 01:32:05,537 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:05,537 INFO L380 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:05,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:05,741 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:05,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:05,742 INFO L82 PathProgramCache]: Analyzing trace with hash 390348542, now seen corresponding path program 5 times [2019-10-15 01:32:05,742 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:05,743 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88786254] [2019-10-15 01:32:05,743 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:05,743 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:05,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:32:06,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88786254] [2019-10-15 01:32:06,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94882191] [2019-10-15 01:32:06,766 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 01:32:06,851 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:32:06,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:06,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:32:06,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:32:06,917 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:32:06,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925898117] [2019-10-15 01:32:06,964 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:32:06,964 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:06,965 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:06,965 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:06,965 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:06,991 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:07,179 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:32:07,185 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:07,196 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:07,979 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:07,979 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4, 13] total 65 [2019-10-15 01:32:07,979 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899121813] [2019-10-15 01:32:07,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-10-15 01:32:07,981 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:07,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-10-15 01:32:07,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=2931, Unknown=0, NotChecked=0, Total=4160 [2019-10-15 01:32:07,982 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 65 states. [2019-10-15 01:32:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:11,856 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2019-10-15 01:32:11,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-10-15 01:32:11,857 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 62 [2019-10-15 01:32:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:11,859 INFO L225 Difference]: With dead ends: 99 [2019-10-15 01:32:11,859 INFO L226 Difference]: Without dead ends: 83 [2019-10-15 01:32:11,863 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3699, Invalid=12051, Unknown=0, NotChecked=0, Total=15750 [2019-10-15 01:32:11,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-15 01:32:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2019-10-15 01:32:11,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-15 01:32:11,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-10-15 01:32:11,874 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 62 [2019-10-15 01:32:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:11,875 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-10-15 01:32:11,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-10-15 01:32:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-10-15 01:32:11,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-15 01:32:11,876 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:11,877 INFO L380 BasicCegarLoop]: trace histogram [47, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:12,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:12,081 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:12,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:12,081 INFO L82 PathProgramCache]: Analyzing trace with hash 973546540, now seen corresponding path program 6 times [2019-10-15 01:32:12,082 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:12,082 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125462895] [2019-10-15 01:32:12,082 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:12,083 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:12,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:32:13,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125462895] [2019-10-15 01:32:13,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819747489] [2019-10-15 01:32:13,446 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 01:32:13,586 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:13,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:13,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 49 conjunts are in the unsatisfiable core [2019-10-15 01:32:13,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:32:13,617 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:32:16,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1510866046] [2019-10-15 01:32:16,126 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:32:16,126 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:16,126 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:16,126 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:16,127 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:16,150 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:16,277 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2019-10-15 01:32:16,283 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:16,286 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:16,970 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:16,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50, 13] total 111 [2019-10-15 01:32:16,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826477734] [2019-10-15 01:32:16,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-10-15 01:32:16,972 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:16,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-10-15 01:32:16,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4890, Invalid=7320, Unknown=0, NotChecked=0, Total=12210 [2019-10-15 01:32:16,978 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 111 states. [2019-10-15 01:32:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:24,435 INFO L93 Difference]: Finished difference Result 151 states and 209 transitions. [2019-10-15 01:32:24,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2019-10-15 01:32:24,437 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 66 [2019-10-15 01:32:24,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:24,438 INFO L225 Difference]: With dead ends: 151 [2019-10-15 01:32:24,439 INFO L226 Difference]: Without dead ends: 132 [2019-10-15 01:32:24,445 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9652 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=14479, Invalid=32393, Unknown=0, NotChecked=0, Total=46872 [2019-10-15 01:32:24,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-15 01:32:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 121. [2019-10-15 01:32:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-15 01:32:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2019-10-15 01:32:24,460 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 66 [2019-10-15 01:32:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:24,460 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2019-10-15 01:32:24,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 111 states. [2019-10-15 01:32:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2019-10-15 01:32:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-15 01:32:24,462 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:24,463 INFO L380 BasicCegarLoop]: trace histogram [96, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:24,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:24,670 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:24,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:24,670 INFO L82 PathProgramCache]: Analyzing trace with hash 734515488, now seen corresponding path program 7 times [2019-10-15 01:32:24,670 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:24,670 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125221419] [2019-10-15 01:32:24,670 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:24,671 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:24,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4667 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:32:28,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125221419] [2019-10-15 01:32:28,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713898447] [2019-10-15 01:32:28,282 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 01:32:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:28,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 98 conjunts are in the unsatisfiable core [2019-10-15 01:32:28,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4667 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:32:28,552 INFO L321 TraceCheckSpWp]: Computing backward predicates...