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_init1_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:33:25,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:33:25,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:33:25,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:33:25,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:33:25,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:33:25,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:33:25,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:33:25,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:33:25,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:33:25,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:33:25,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:33:25,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:33:25,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:33:25,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:33:25,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:33:25,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:33:25,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:33:25,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:33:25,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:33:25,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:33:25,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:33:25,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:33:25,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:33:25,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:33:25,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:33:25,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:33:25,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:33:25,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:33:25,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:33:25,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:33:25,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:33:25,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:33:25,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:33:25,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:33:25,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:33:25,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:33:25,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:33:25,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:33:25,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:33:25,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:33:25,340 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 01:33:25,356 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:33:25,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:33:25,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:33:25,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:33:25,359 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:33:25,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:33:25,360 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:33:25,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:33:25,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:33:25,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:33:25,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:33:25,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:33:25,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:33:25,362 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:33:25,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:33:25,362 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:33:25,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:33:25,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:33:25,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:33:25,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:33:25,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:33:25,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:33:25,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:33:25,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:33:25,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:33:25,365 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:33:25,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:33:25,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:33:25,365 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 01:33:25,633 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:33:25,646 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:33:25,649 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:33:25,651 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:33:25,651 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:33:25,652 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init1_ground-2.i [2019-10-15 01:33:25,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60748f2d7/f78b130bc0c64e7f81511e8975e89dc0/FLAG6ab21a9ae [2019-10-15 01:33:26,231 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:33:26,232 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init1_ground-2.i [2019-10-15 01:33:26,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60748f2d7/f78b130bc0c64e7f81511e8975e89dc0/FLAG6ab21a9ae [2019-10-15 01:33:26,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60748f2d7/f78b130bc0c64e7f81511e8975e89dc0 [2019-10-15 01:33:26,591 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:33:26,592 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:33:26,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:26,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:33:26,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:33:26,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:26" (1/1) ... [2019-10-15 01:33:26,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f58af8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:26, skipping insertion in model container [2019-10-15 01:33:26,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:26" (1/1) ... [2019-10-15 01:33:26,611 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:33:26,631 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:33:26,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:26,809 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:33:26,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:26,860 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:33:26,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:26 WrapperNode [2019-10-15 01:33:26,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:26,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:33:26,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:33:26,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:33:26,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:26" (1/1) ... [2019-10-15 01:33:26,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:26" (1/1) ... [2019-10-15 01:33:26,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:26" (1/1) ... [2019-10-15 01:33:26,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:26" (1/1) ... [2019-10-15 01:33:26,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:26" (1/1) ... [2019-10-15 01:33:26,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:26" (1/1) ... [2019-10-15 01:33:26,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:26" (1/1) ... [2019-10-15 01:33:26,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:33:26,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:33:26,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:33:26,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:33:26,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:26" (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 01:33:27,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:33:27,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:33:27,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:33:27,055 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:33:27,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:33:27,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:33:27,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:33:27,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:33:27,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:33:27,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:33:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:33:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:33:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:33:27,347 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:33:27,348 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 01:33:27,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:27 BoogieIcfgContainer [2019-10-15 01:33:27,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:33:27,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:33:27,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:33:27,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:33:27,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:33:26" (1/3) ... [2019-10-15 01:33:27,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f2e916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:27, skipping insertion in model container [2019-10-15 01:33:27,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:26" (2/3) ... [2019-10-15 01:33:27,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f2e916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:27, skipping insertion in model container [2019-10-15 01:33:27,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:27" (3/3) ... [2019-10-15 01:33:27,363 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init1_ground-2.i [2019-10-15 01:33:27,373 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:33:27,381 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:33:27,392 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:33:27,415 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:33:27,415 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:33:27,415 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:33:27,415 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:33:27,415 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:33:27,415 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:33:27,416 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:33:27,416 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:33:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-15 01:33:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:33:27,437 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:27,438 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:27,440 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:27,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:27,445 INFO L82 PathProgramCache]: Analyzing trace with hash 243563535, now seen corresponding path program 1 times [2019-10-15 01:33:27,452 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:27,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744213224] [2019-10-15 01:33:27,452 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:27,453 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:27,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:27,612 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 01:33:27,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744213224] [2019-10-15 01:33:27,614 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:33:27,614 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:33:27,614 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971496359] [2019-10-15 01:33:27,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:33:27,619 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:27,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:33:27,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:33:27,631 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-10-15 01:33:27,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:27,660 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 01:33:27,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:33:27,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:33:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:27,670 INFO L225 Difference]: With dead ends: 31 [2019-10-15 01:33:27,670 INFO L226 Difference]: Without dead ends: 16 [2019-10-15 01:33:27,673 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 01:33:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-15 01:33:27,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-15 01:33:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-15 01:33:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-10-15 01:33:27,709 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2019-10-15 01:33:27,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:27,709 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-10-15 01:33:27,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:33:27,710 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-10-15 01:33:27,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:33:27,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:27,711 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:27,711 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:27,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:27,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1400307069, now seen corresponding path program 1 times [2019-10-15 01:33:27,713 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:27,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86306960] [2019-10-15 01:33:27,713 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:27,713 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:27,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:27,786 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 01:33:27,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86306960] [2019-10-15 01:33:27,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991905139] [2019-10-15 01:33:27,787 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 01:33:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:27,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:33:27,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:27,876 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 01:33:27,876 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:27,929 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 01:33:27,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [698970988] [2019-10-15 01:33:27,962 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 01:33:27,963 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:27,984 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:27,995 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:27,996 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:28,151 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:28,594 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:28,622 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:28,633 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:29,197 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:29,197 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:33:29,197 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39026801] [2019-10-15 01:33:29,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:33:29,201 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:29,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:33:29,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:33:29,205 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 17 states. [2019-10-15 01:33:30,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:30,000 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2019-10-15 01:33:30,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:33:30,001 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 12 [2019-10-15 01:33:30,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:30,002 INFO L225 Difference]: With dead ends: 37 [2019-10-15 01:33:30,002 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:33:30,004 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:33:30,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:33:30,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2019-10-15 01:33:30,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 01:33:30,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-10-15 01:33:30,011 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2019-10-15 01:33:30,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:30,011 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-10-15 01:33:30,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:33:30,011 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-10-15 01:33:30,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:33:30,012 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:30,012 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:30,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:30,214 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:30,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:30,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1364428529, now seen corresponding path program 2 times [2019-10-15 01:33:30,214 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:30,215 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919292325] [2019-10-15 01:33:30,215 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:30,215 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:30,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:30,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919292325] [2019-10-15 01:33:30,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756278183] [2019-10-15 01:33:30,292 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 01:33:30,342 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:33:30,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:30,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:33:30,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:30,369 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:30,458 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1744549024] [2019-10-15 01:33:30,460 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 01:33:30,460 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:30,461 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:30,461 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:30,461 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:30,516 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:30,736 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:30,752 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:30,762 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:31,189 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:31,189 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:33:31,189 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336536100] [2019-10-15 01:33:31,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:33:31,193 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:31,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:33:31,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:33:31,194 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 23 states. [2019-10-15 01:33:32,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:32,074 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2019-10-15 01:33:32,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:33:32,075 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 15 [2019-10-15 01:33:32,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:32,076 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:33:32,076 INFO L226 Difference]: Without dead ends: 34 [2019-10-15 01:33:32,077 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:33:32,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-15 01:33:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2019-10-15 01:33:32,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:33:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-10-15 01:33:32,085 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 15 [2019-10-15 01:33:32,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:32,085 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-10-15 01:33:32,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:33:32,086 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-10-15 01:33:32,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:33:32,087 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:32,087 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:32,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:32,291 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:32,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:32,292 INFO L82 PathProgramCache]: Analyzing trace with hash 883442831, now seen corresponding path program 3 times [2019-10-15 01:33:32,292 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:32,292 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553101338] [2019-10-15 01:33:32,293 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:32,293 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:32,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:32,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553101338] [2019-10-15 01:33:32,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796210730] [2019-10-15 01:33:32,482 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 01:33:32,563 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:33:32,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:32,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:33:32,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:32,590 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:32,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1989817721] [2019-10-15 01:33:32,847 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 01:33:32,847 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:32,849 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:32,849 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:32,849 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:32,884 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:33,049 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:33,083 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:33,092 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:33,525 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:33,525 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:33:33,525 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090228947] [2019-10-15 01:33:33,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:33:33,527 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:33,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:33:33,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:33:33,529 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 35 states. [2019-10-15 01:33:34,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:34,963 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2019-10-15 01:33:34,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:33:34,963 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 21 [2019-10-15 01:33:34,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:34,965 INFO L225 Difference]: With dead ends: 55 [2019-10-15 01:33:34,966 INFO L226 Difference]: Without dead ends: 46 [2019-10-15 01:33:34,968 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:33:34,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-15 01:33:34,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2019-10-15 01:33:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 01:33:34,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-10-15 01:33:34,977 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 21 [2019-10-15 01:33:34,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:34,977 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-10-15 01:33:34,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:33:34,978 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-10-15 01:33:34,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 01:33:34,979 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:34,979 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:35,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:35,193 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:35,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:35,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1549534321, now seen corresponding path program 4 times [2019-10-15 01:33:35,194 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:35,194 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99233473] [2019-10-15 01:33:35,194 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:35,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:35,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:35,561 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99233473] [2019-10-15 01:33:35,561 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683724518] [2019-10-15 01:33:35,562 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 01:33:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:35,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:33:35,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:35,665 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:36,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1047657727] [2019-10-15 01:33:36,373 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 01:33:36,374 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:36,374 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:36,374 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:36,375 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:36,413 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:36,538 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:36,546 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:36,549 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:37,046 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:37,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:33:37,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331042362] [2019-10-15 01:33:37,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:33:37,049 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:37,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:33:37,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:33:37,051 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 59 states. [2019-10-15 01:33:40,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:40,233 INFO L93 Difference]: Finished difference Result 79 states and 104 transitions. [2019-10-15 01:33:40,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:33:40,236 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 33 [2019-10-15 01:33:40,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:40,237 INFO L225 Difference]: With dead ends: 79 [2019-10-15 01:33:40,237 INFO L226 Difference]: Without dead ends: 70 [2019-10-15 01:33:40,241 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:33:40,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-15 01:33:40,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2019-10-15 01:33:40,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-15 01:33:40,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2019-10-15 01:33:40,254 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 33 [2019-10-15 01:33:40,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:40,254 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2019-10-15 01:33:40,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:33:40,254 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2019-10-15 01:33:40,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 01:33:40,256 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:40,256 INFO L380 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:40,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:40,469 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:40,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:40,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1865684593, now seen corresponding path program 5 times [2019-10-15 01:33:40,470 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:40,470 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65684761] [2019-10-15 01:33:40,471 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:40,471 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:40,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:41,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65684761] [2019-10-15 01:33:41,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144509107] [2019-10-15 01:33:41,467 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