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-tiling/mlceu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:38:06,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:38:06,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:38:06,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:38:06,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:38:06,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:38:06,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:38:06,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:38:06,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:38:06,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:38:06,309 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:38:06,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:38:06,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:38:06,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:38:06,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:38:06,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:38:06,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:38:06,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:38:06,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:38:06,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:38:06,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:38:06,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:38:06,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:38:06,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:38:06,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:38:06,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:38:06,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:38:06,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:38:06,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:38:06,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:38:06,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:38:06,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:38:06,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:38:06,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:38:06,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:38:06,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:38:06,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:38:06,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:38:06,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:38:06,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:38:06,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:38:06,350 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 01:38:06,365 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:38:06,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:38:06,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:38:06,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:38:06,367 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:38:06,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:38:06,367 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:38:06,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:38:06,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:38:06,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:38:06,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:38:06,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:38:06,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:38:06,368 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:38:06,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:38:06,369 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:38:06,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:38:06,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:38:06,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:38:06,369 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:38:06,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:38:06,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:38:06,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:38:06,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:38:06,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:38:06,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:38:06,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:38:06,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:38:06,371 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 01:38:06,677 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:38:06,691 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:38:06,694 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:38:06,696 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:38:06,696 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:38:06,697 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mlceu.c [2019-10-15 01:38:06,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e929896e0/c50cf58db1454ad39b1295b14f31519a/FLAGf592e95b9 [2019-10-15 01:38:07,240 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:38:07,241 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mlceu.c [2019-10-15 01:38:07,248 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e929896e0/c50cf58db1454ad39b1295b14f31519a/FLAGf592e95b9 [2019-10-15 01:38:07,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e929896e0/c50cf58db1454ad39b1295b14f31519a [2019-10-15 01:38:07,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:38:07,653 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:38:07,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:38:07,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:38:07,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:38:07,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:07,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27396f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07, skipping insertion in model container [2019-10-15 01:38:07,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:07,671 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:38:07,689 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:38:07,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:38:07,895 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:38:07,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:38:07,925 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:38:07,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07 WrapperNode [2019-10-15 01:38:07,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:38:07,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:38:07,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:38:07,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:38:08,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:08,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:08,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:08,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:08,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:08,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:08,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:08,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:38:08,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:38:08,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:38:08,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:38:08,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (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 01:38:08,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:38:08,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:38:08,110 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:38:08,110 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:38:08,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:38:08,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:38:08,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:38:08,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:38:08,111 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:38:08,111 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:38:08,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:38:08,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:38:08,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:38:08,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:38:08,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:38:08,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:38:08,489 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:38:08,489 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 01:38:08,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:38:08 BoogieIcfgContainer [2019-10-15 01:38:08,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:38:08,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:38:08,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:38:08,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:38:08,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:38:07" (1/3) ... [2019-10-15 01:38:08,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70bbdb44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:38:08, skipping insertion in model container [2019-10-15 01:38:08,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (2/3) ... [2019-10-15 01:38:08,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70bbdb44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:38:08, skipping insertion in model container [2019-10-15 01:38:08,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:38:08" (3/3) ... [2019-10-15 01:38:08,499 INFO L109 eAbstractionObserver]: Analyzing ICFG mlceu.c [2019-10-15 01:38:08,509 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:38:08,517 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:38:08,528 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:38:08,556 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:38:08,556 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:38:08,556 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:38:08,556 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:38:08,557 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:38:08,557 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:38:08,557 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:38:08,557 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:38:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 01:38:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:38:08,577 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:08,578 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:08,580 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:08,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:08,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1161728312, now seen corresponding path program 1 times [2019-10-15 01:38:08,593 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:08,593 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752495412] [2019-10-15 01:38:08,594 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:08,594 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:08,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:08,782 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 01:38:08,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752495412] [2019-10-15 01:38:08,784 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:38:08,785 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:38:08,785 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235785787] [2019-10-15 01:38:08,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:38:08,790 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:08,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:38:08,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:38:08,815 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-10-15 01:38:08,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:08,877 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2019-10-15 01:38:08,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:38:08,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:38:08,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:08,889 INFO L225 Difference]: With dead ends: 34 [2019-10-15 01:38:08,889 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:38:08,893 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 01:38:08,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:38:08,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:38:08,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:38:08,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-15 01:38:08,949 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2019-10-15 01:38:08,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:08,950 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-15 01:38:08,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:38:08,951 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-15 01:38:08,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:38:08,951 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:08,952 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:08,952 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:08,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:08,953 INFO L82 PathProgramCache]: Analyzing trace with hash 941325065, now seen corresponding path program 1 times [2019-10-15 01:38:08,953 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:08,953 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903593584] [2019-10-15 01:38:08,954 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:08,954 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:08,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:09,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903593584] [2019-10-15 01:38:09,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171393331] [2019-10-15 01:38:09,089 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 01:38:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:09,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:38:09,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:09,225 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:09,262 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1678292434] [2019-10-15 01:38:09,290 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:38:09,291 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:09,299 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:09,308 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:09,309 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:09,571 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:38:09,892 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:10,013 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2019-10-15 01:38:10,028 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:38:10,039 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:10,566 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 23 [2019-10-15 01:38:10,893 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:10,894 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:38:10,894 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771716870] [2019-10-15 01:38:10,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:38:10,897 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:10,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:38:10,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:38:10,901 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 18 states. [2019-10-15 01:38:11,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:11,586 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-10-15 01:38:11,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:38:11,587 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2019-10-15 01:38:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:11,589 INFO L225 Difference]: With dead ends: 36 [2019-10-15 01:38:11,589 INFO L226 Difference]: Without dead ends: 27 [2019-10-15 01:38:11,591 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:38:11,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-15 01:38:11,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2019-10-15 01:38:11,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:38:11,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-10-15 01:38:11,605 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-10-15 01:38:11,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:11,605 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-10-15 01:38:11,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:38:11,605 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-10-15 01:38:11,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:38:11,607 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:11,607 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:11,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:11,815 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:11,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1596208296, now seen corresponding path program 2 times [2019-10-15 01:38:11,816 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:11,816 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863168942] [2019-10-15 01:38:11,816 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:11,816 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:11,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:12,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863168942] [2019-10-15 01:38:12,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247777173] [2019-10-15 01:38:12,091 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 01:38:12,146 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:38:12,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:38:12,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-15 01:38:12,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:12,348 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:12,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1605579723] [2019-10-15 01:38:12,570 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:38:12,570 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:12,570 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:12,571 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:12,571 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:12,639 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:38:12,837 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:12,995 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2019-10-15 01:38:13,010 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:38:13,026 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:13,630 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 23 [2019-10-15 01:38:14,038 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:14,038 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9, 11] total 31 [2019-10-15 01:38:14,038 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582045049] [2019-10-15 01:38:14,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-15 01:38:14,040 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:14,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-15 01:38:14,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2019-10-15 01:38:14,041 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 31 states. [2019-10-15 01:38:15,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:15,464 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-10-15 01:38:15,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 01:38:15,465 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 14 [2019-10-15 01:38:15,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:15,468 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:38:15,468 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:38:15,469 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=250, Invalid=1642, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:38:15,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:38:15,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-15 01:38:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-15 01:38:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-10-15 01:38:15,482 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 14 [2019-10-15 01:38:15,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:15,482 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-10-15 01:38:15,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-15 01:38:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-10-15 01:38:15,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:38:15,490 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:15,490 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:15,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:15,692 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:15,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:15,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1737888264, now seen corresponding path program 1 times [2019-10-15 01:38:15,693 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:15,693 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848350944] [2019-10-15 01:38:15,694 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:15,694 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:15,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:38:15,802 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848350944] [2019-10-15 01:38:15,802 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710374278] [2019-10-15 01:38:15,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:38:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:15,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 01:38:15,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:38:15,924 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:38:15,989 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [457225653] [2019-10-15 01:38:15,991 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:38:15,991 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:15,992 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:15,992 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:15,992 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:16,040 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:38:16,152 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:16,577 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2019-10-15 01:38:16,591 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:38:16,596 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:17,078 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 23 [2019-10-15 01:38:17,530 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:17,530 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 12] total 26 [2019-10-15 01:38:17,530 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152535527] [2019-10-15 01:38:17,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 01:38:17,531 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:17,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 01:38:17,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2019-10-15 01:38:17,532 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 26 states. [2019-10-15 01:38:19,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:19,518 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2019-10-15 01:38:19,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-15 01:38:19,518 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2019-10-15 01:38:19,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:19,520 INFO L225 Difference]: With dead ends: 52 [2019-10-15 01:38:19,520 INFO L226 Difference]: Without dead ends: 32 [2019-10-15 01:38:19,524 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=354, Invalid=2096, Unknown=0, NotChecked=0, Total=2450 [2019-10-15 01:38:19,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-15 01:38:19,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2019-10-15 01:38:19,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 01:38:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-15 01:38:19,540 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 28 [2019-10-15 01:38:19,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:19,541 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-15 01:38:19,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 01:38:19,541 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-15 01:38:19,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 01:38:19,543 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:19,543 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:19,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:19,750 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:19,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:19,751 INFO L82 PathProgramCache]: Analyzing trace with hash -922544695, now seen corresponding path program 2 times [2019-10-15 01:38:19,751 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:19,751 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089814445] [2019-10-15 01:38:19,751 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:19,751 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:19,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:38:19,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089814445] [2019-10-15 01:38:19,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563445713] [2019-10-15 01:38:19,899 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 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 01:38:19,969 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:38:19,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:38:19,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-15 01:38:19,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:20,076 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:38:20,572 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:38:21,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1358965181] [2019-10-15 01:38:21,077 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:38:21,078 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:21,078 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:21,078 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:21,079 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:21,111 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2019-10-15 01:38:21,191 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:21,537 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2019-10-15 01:38:21,549 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:38:21,553 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:22,319 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 23 [2019-10-15 01:38:23,038 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:23,039 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 12, 12] total 44 [2019-10-15 01:38:23,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919213757] [2019-10-15 01:38:23,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-15 01:38:23,041 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:23,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-15 01:38:23,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:38:23,043 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 44 states. [2019-10-15 01:38:26,273 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2019-10-15 01:38:26,425 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2019-10-15 01:38:28,336 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2019-10-15 01:38:29,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:29,223 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2019-10-15 01:38:29,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-10-15 01:38:29,223 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 29 [2019-10-15 01:38:29,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:29,224 INFO L225 Difference]: With dead ends: 70 [2019-10-15 01:38:29,224 INFO L226 Difference]: Without dead ends: 37 [2019-10-15 01:38:29,228 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1003, Invalid=7007, Unknown=0, NotChecked=0, Total=8010 [2019-10-15 01:38:29,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-15 01:38:29,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-10-15 01:38:29,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-15 01:38:29,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-10-15 01:38:29,239 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2019-10-15 01:38:29,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:29,239 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-10-15 01:38:29,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-15 01:38:29,240 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-10-15 01:38:29,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-15 01:38:29,241 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:29,241 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:29,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:29,450 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:29,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:29,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1289388554, now seen corresponding path program 3 times [2019-10-15 01:38:29,451 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:29,451 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975952761] [2019-10-15 01:38:29,452 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:29,452 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:29,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:38:29,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975952761] [2019-10-15 01:38:29,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989038654] [2019-10-15 01:38:29,742 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 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 01:38:29,831 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:38:29,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:38:29,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 37 conjunts are in the unsatisfiable core [2019-10-15 01:38:29,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:38:30,559 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:38:30,937 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [24534405] [2019-10-15 01:38:30,938 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:38:30,938 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:30,939 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:30,939 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:30,939 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:30,966 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 01:38:31,093 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:31,319 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2019-10-15 01:38:31,328 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:38:31,332 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:32,094 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 23 [2019-10-15 01:38:32,998 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:32,998 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 15, 12] total 49 [2019-10-15 01:38:32,998 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336328740] [2019-10-15 01:38:32,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-10-15 01:38:33,000 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:33,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-10-15 01:38:33,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2160, Unknown=0, NotChecked=0, Total=2352 [2019-10-15 01:38:33,001 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 49 states. [2019-10-15 01:38:37,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:37,994 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-10-15 01:38:37,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-15 01:38:37,995 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 38 [2019-10-15 01:38:37,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:37,996 INFO L225 Difference]: With dead ends: 46 [2019-10-15 01:38:37,996 INFO L226 Difference]: Without dead ends: 44 [2019-10-15 01:38:37,999 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=595, Invalid=5104, Unknown=1, NotChecked=0, Total=5700 [2019-10-15 01:38:37,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-15 01:38:38,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-10-15 01:38:38,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-15 01:38:38,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-10-15 01:38:38,013 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 38 [2019-10-15 01:38:38,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:38,013 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-10-15 01:38:38,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-10-15 01:38:38,013 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-10-15 01:38:38,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-15 01:38:38,015 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:38,015 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:38,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:38,216 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:38,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:38,217 INFO L82 PathProgramCache]: Analyzing trace with hash -402520790, now seen corresponding path program 4 times [2019-10-15 01:38:38,217 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:38,218 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490780573] [2019-10-15 01:38:38,218 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:38,218 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:38,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:38:38,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490780573] [2019-10-15 01:38:38,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51791435] [2019-10-15 01:38:38,343 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 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 01:38:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:38,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:38:38,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:38:38,596 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:38:38,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1063396421] [2019-10-15 01:38:38,682 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:38:38,682 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:38,682 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:38,682 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:38,683 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:38,704 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2019-10-15 01:38:38,772 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:38,984 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2019-10-15 01:38:38,998 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:38:39,002 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:40,105 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:40,106 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14, 12] total 35 [2019-10-15 01:38:40,106 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663860584] [2019-10-15 01:38:40,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:38:40,107 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:40,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:38:40,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:38:40,108 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 35 states. [2019-10-15 01:38:44,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:44,251 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2019-10-15 01:38:44,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-10-15 01:38:44,251 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 52 [2019-10-15 01:38:44,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:44,253 INFO L225 Difference]: With dead ends: 79 [2019-10-15 01:38:44,253 INFO L226 Difference]: Without dead ends: 46 [2019-10-15 01:38:44,255 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 120 SyntacticMatches, 16 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=860, Invalid=4991, Unknown=1, NotChecked=0, Total=5852 [2019-10-15 01:38:44,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-15 01:38:44,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-10-15 01:38:44,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-15 01:38:44,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2019-10-15 01:38:44,268 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 52 [2019-10-15 01:38:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:44,269 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2019-10-15 01:38:44,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:38:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2019-10-15 01:38:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-15 01:38:44,270 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:44,270 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:44,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:44,474 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:44,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:44,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1690634747, now seen corresponding path program 5 times [2019-10-15 01:38:44,474 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:44,475 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637689780] [2019-10-15 01:38:44,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:44,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:44,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:38:44,802 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637689780] [2019-10-15 01:38:44,803 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770784743] [2019-10-15 01:38:44,803 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 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 01:38:44,980 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-15 01:38:44,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:38:44,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-15 01:38:44,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:45,177 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:38:46,915 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:38:47,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [696646849] [2019-10-15 01:38:47,752 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:38:47,752 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:47,752 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:47,753 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:47,753 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:47,780 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2019-10-15 01:38:47,874 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:47,879 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:47,928 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:48,143 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2019-10-15 01:38:48,153 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 01:38:48,156 INFO L183 IcfgInterpreter]: Interpretation finished