java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_init3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:33:35,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:33:35,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:33:35,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:33:35,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:33:35,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:33:35,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:33:35,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:33:35,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:33:35,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:33:35,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:33:35,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:33:35,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:33:35,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:33:35,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:33:35,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:33:35,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:33:35,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:33:35,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:33:35,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:33:35,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:33:35,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:33:35,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:33:35,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:33:35,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:33:35,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:33:35,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:33:35,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:33:35,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:33:35,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:33:35,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:33:35,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:33:35,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:33:35,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:33:35,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:33:35,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:33:35,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:33:35,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:33:35,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:33:35,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:33:35,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:33:35,380 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 01:33:35,412 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:33:35,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:33:35,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:33:35,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:33:35,414 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:33:35,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:33:35,414 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:33:35,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:33:35,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:33:35,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:33:35,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:33:35,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:33:35,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:33:35,415 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:33:35,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:33:35,416 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:33:35,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:33:35,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:33:35,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:33:35,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:33:35,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:33:35,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:33:35,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:33:35,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:33:35,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:33:35,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:33:35,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:33:35,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:33:35,418 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 01:33:35,694 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:33:35,707 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:33:35,710 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:33:35,712 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:33:35,712 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:33:35,713 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init3_ground-1.i [2019-10-15 01:33:35,774 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/953489bc1/2223c2783fe44819ab96b6fe5d28fdfd/FLAGf422fe60d [2019-10-15 01:33:36,250 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:33:36,251 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init3_ground-1.i [2019-10-15 01:33:36,258 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/953489bc1/2223c2783fe44819ab96b6fe5d28fdfd/FLAGf422fe60d [2019-10-15 01:33:36,619 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/953489bc1/2223c2783fe44819ab96b6fe5d28fdfd [2019-10-15 01:33:36,629 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:33:36,630 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:33:36,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:36,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:33:36,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:33:36,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:36" (1/1) ... [2019-10-15 01:33:36,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33a1ee07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:36, skipping insertion in model container [2019-10-15 01:33:36,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:36" (1/1) ... [2019-10-15 01:33:36,646 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:33:36,663 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:33:36,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:36,867 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:33:36,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:36,904 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:33:36,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:36 WrapperNode [2019-10-15 01:33:36,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:36,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:33:36,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:33:36,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:33:37,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:36" (1/1) ... [2019-10-15 01:33:37,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:36" (1/1) ... [2019-10-15 01:33:37,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:36" (1/1) ... [2019-10-15 01:33:37,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:36" (1/1) ... [2019-10-15 01:33:37,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:36" (1/1) ... [2019-10-15 01:33:37,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:36" (1/1) ... [2019-10-15 01:33:37,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:36" (1/1) ... [2019-10-15 01:33:37,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:33:37,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:33:37,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:33:37,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:33:37,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:36" (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 01:33:37,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:33:37,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:33:37,085 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:33:37,085 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:33:37,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:33:37,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:33:37,086 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:33:37,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:33:37,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:33:37,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:33:37,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:33:37,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:33:37,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:33:37,436 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:33:37,437 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 01:33:37,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:37 BoogieIcfgContainer [2019-10-15 01:33:37,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:33:37,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:33:37,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:33:37,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:33:37,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:33:36" (1/3) ... [2019-10-15 01:33:37,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186f5e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:37, skipping insertion in model container [2019-10-15 01:33:37,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:36" (2/3) ... [2019-10-15 01:33:37,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186f5e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:37, skipping insertion in model container [2019-10-15 01:33:37,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:37" (3/3) ... [2019-10-15 01:33:37,463 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init3_ground-1.i [2019-10-15 01:33:37,476 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:33:37,483 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:33:37,496 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:33:37,518 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:33:37,518 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:33:37,518 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:33:37,519 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:33:37,519 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:33:37,519 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:33:37,519 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:33:37,519 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:33:37,536 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 01:33:37,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:33:37,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:37,542 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:37,543 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:37,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:37,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1905658029, now seen corresponding path program 1 times [2019-10-15 01:33:37,555 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:37,556 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387481926] [2019-10-15 01:33:37,556 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:37,556 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:37,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:37,716 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 01:33:37,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387481926] [2019-10-15 01:33:37,719 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:33:37,720 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:33:37,720 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909251848] [2019-10-15 01:33:37,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:33:37,727 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:37,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:33:37,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:33:37,747 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-10-15 01:33:37,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:37,833 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2019-10-15 01:33:37,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:33:37,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:33:37,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:37,847 INFO L225 Difference]: With dead ends: 37 [2019-10-15 01:33:37,847 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:33:37,854 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 01:33:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:33:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:33:37,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:33:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-10-15 01:33:37,909 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2019-10-15 01:33:37,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:37,910 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-10-15 01:33:37,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:33:37,911 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-10-15 01:33:37,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:33:37,912 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:37,912 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:37,912 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:37,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:37,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1984082666, now seen corresponding path program 1 times [2019-10-15 01:33:37,913 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:37,914 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647922543] [2019-10-15 01:33:37,914 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:37,914 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:37,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:38,007 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 01:33:38,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647922543] [2019-10-15 01:33:38,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172958872] [2019-10-15 01:33:38,008 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 01:33:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:38,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:33:38,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:38,116 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 01:33:38,116 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:38,162 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 01:33:38,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1450562474] [2019-10-15 01:33:38,194 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:33:38,195 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:38,202 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:38,209 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:38,210 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:38,414 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:39,063 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:39,078 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:39,085 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:39,631 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:39,632 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:33:39,632 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459255787] [2019-10-15 01:33:39,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:33:39,635 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:39,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:33:39,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:33:39,637 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 17 states. [2019-10-15 01:33:40,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:40,382 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2019-10-15 01:33:40,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:33:40,383 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2019-10-15 01:33:40,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:40,384 INFO L225 Difference]: With dead ends: 51 [2019-10-15 01:33:40,384 INFO L226 Difference]: Without dead ends: 38 [2019-10-15 01:33:40,386 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:33:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-15 01:33:40,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2019-10-15 01:33:40,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 01:33:40,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-10-15 01:33:40,394 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 16 [2019-10-15 01:33:40,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:40,395 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-10-15 01:33:40,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:33:40,395 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-10-15 01:33:40,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:33:40,396 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:40,396 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:40,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:40,601 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:40,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:40,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1492132205, now seen corresponding path program 2 times [2019-10-15 01:33:40,601 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:40,602 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79128931] [2019-10-15 01:33:40,602 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:40,602 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:40,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:33:40,715 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79128931] [2019-10-15 01:33:40,716 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990965628] [2019-10-15 01:33:40,716 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 01:33:40,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:33:40,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:40,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:33:40,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:33:40,805 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:33:40,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1007255040] [2019-10-15 01:33:40,889 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:33:40,889 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:40,890 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:40,890 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:40,891 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:40,945 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:41,484 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:41,498 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:41,503 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:42,058 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:42,059 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:33:42,059 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681694385] [2019-10-15 01:33:42,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:33:42,061 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:42,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:33:42,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:33:42,062 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 23 states. [2019-10-15 01:33:43,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:43,022 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2019-10-15 01:33:43,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:33:43,022 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2019-10-15 01:33:43,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:43,024 INFO L225 Difference]: With dead ends: 75 [2019-10-15 01:33:43,024 INFO L226 Difference]: Without dead ends: 56 [2019-10-15 01:33:43,025 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:33:43,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-15 01:33:43,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-10-15 01:33:43,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-15 01:33:43,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-10-15 01:33:43,037 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 25 [2019-10-15 01:33:43,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:43,038 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-10-15 01:33:43,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:33:43,038 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-10-15 01:33:43,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 01:33:43,039 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:43,040 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:43,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:43,244 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:43,245 INFO L82 PathProgramCache]: Analyzing trace with hash -776537459, now seen corresponding path program 3 times [2019-10-15 01:33:43,245 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:43,246 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109458209] [2019-10-15 01:33:43,246 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:43,246 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:43,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-15 01:33:43,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109458209] [2019-10-15 01:33:43,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593986406] [2019-10-15 01:33:43,450 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 01:33:43,538 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:33:43,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:43,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:33:43,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-15 01:33:43,571 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-15 01:33:43,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [753229581] [2019-10-15 01:33:43,780 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:33:43,780 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:43,780 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:43,781 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:43,781 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:43,811 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:44,144 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:44,151 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:44,155 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:44,875 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:44,876 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:33:44,876 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594170520] [2019-10-15 01:33:44,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:33:44,878 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:44,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:33:44,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:33:44,881 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 35 states. [2019-10-15 01:33:46,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:46,603 INFO L93 Difference]: Finished difference Result 123 states and 164 transitions. [2019-10-15 01:33:46,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:33:46,604 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2019-10-15 01:33:46,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:46,605 INFO L225 Difference]: With dead ends: 123 [2019-10-15 01:33:46,606 INFO L226 Difference]: Without dead ends: 92 [2019-10-15 01:33:46,608 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 87 SyntacticMatches, 22 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:33:46,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-15 01:33:46,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2019-10-15 01:33:46,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-15 01:33:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2019-10-15 01:33:46,623 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 43 [2019-10-15 01:33:46,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:46,623 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2019-10-15 01:33:46,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:33:46,623 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2019-10-15 01:33:46,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-15 01:33:46,626 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:46,626 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:46,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:46,830 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:46,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:46,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1525888205, now seen corresponding path program 4 times [2019-10-15 01:33:46,831 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:46,832 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462558751] [2019-10-15 01:33:46,832 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:46,832 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:46,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-10-15 01:33:47,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462558751] [2019-10-15 01:33:47,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330205126] [2019-10-15 01:33:47,250 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 01:33:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:47,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:33:47,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-10-15 01:33:47,381 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-10-15 01:33:48,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2044530336] [2019-10-15 01:33:48,088 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:33:48,088 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:48,089 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:48,089 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:48,089 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:48,125 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:48,375 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:48,381 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:48,384 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:49,794 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:49,794 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:33:49,794 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756178120] [2019-10-15 01:33:49,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:33:49,796 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:49,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:33:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:33:49,799 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 59 states. [2019-10-15 01:33:53,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:53,353 INFO L93 Difference]: Finished difference Result 219 states and 296 transitions. [2019-10-15 01:33:53,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:33:53,353 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 79 [2019-10-15 01:33:53,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:53,356 INFO L225 Difference]: With dead ends: 219 [2019-10-15 01:33:53,356 INFO L226 Difference]: Without dead ends: 164 [2019-10-15 01:33:53,361 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 159 SyntacticMatches, 46 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6019 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:33:53,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-10-15 01:33:53,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2019-10-15 01:33:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-10-15 01:33:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2019-10-15 01:33:53,384 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 79 [2019-10-15 01:33:53,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:53,385 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2019-10-15 01:33:53,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:33:53,385 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2019-10-15 01:33:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-15 01:33:53,391 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:53,391 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:53,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:53,595 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:53,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:53,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1051866803, now seen corresponding path program 5 times [2019-10-15 01:33:53,596 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:53,597 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590497966] [2019-10-15 01:33:53,597 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:53,597 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:53,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2019-10-15 01:33:54,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590497966] [2019-10-15 01:33:54,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297245946] [2019-10-15 01:33:54,696 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