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_init6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:34:05,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:34:05,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:34:05,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:34:05,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:34:05,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:34:05,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:34:05,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:34:05,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:34:05,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:34:05,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:34:05,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:34:05,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:34:05,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:34:05,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:34:05,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:34:05,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:34:05,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:34:05,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:34:05,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:34:05,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:34:05,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:34:05,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:34:05,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:34:05,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:34:05,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:34:05,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:34:05,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:34:05,346 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 01:34:05,362 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:34:05,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:34:05,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:34:05,364 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:34:05,364 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:34:05,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:34:05,365 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:34:05,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:34:05,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:34:05,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:34:05,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:34:05,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:34:05,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:34:05,366 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:34:05,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:34:05,366 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:34:05,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:34:05,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:34:05,367 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:34:05,367 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:34:05,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:34:05,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:05,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:34:05,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:34:05,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:34:05,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:34:05,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:34:05,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:34:05,369 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 01:34:05,632 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:34:05,645 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:34:05,649 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:34:05,650 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:34:05,650 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:34:05,651 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2019-10-15 01:34:05,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23b14d92c/baf5f90e1b9449cda137dce53f5f2e05/FLAG8f53cd4d8 [2019-10-15 01:34:06,183 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:34:06,185 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2019-10-15 01:34:06,191 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23b14d92c/baf5f90e1b9449cda137dce53f5f2e05/FLAG8f53cd4d8 [2019-10-15 01:34:06,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23b14d92c/baf5f90e1b9449cda137dce53f5f2e05 [2019-10-15 01:34:06,584 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:06,586 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:06,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:06,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:06,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:06,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:06,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54268d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06, skipping insertion in model container [2019-10-15 01:34:06,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:06,601 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:06,617 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:06,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:06,831 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:06,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:06,872 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:06,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06 WrapperNode [2019-10-15 01:34:06,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:06,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:06,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:06,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:06,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:06,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:06,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:06,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:06,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:07,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:07,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:07,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:07,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:07,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:07,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:07,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (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 01:34:07,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:07,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:07,072 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:07,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:07,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:07,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:07,072 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:07,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:07,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:07,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:07,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:07,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:07,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:07,469 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:07,469 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-15 01:34:07,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:07 BoogieIcfgContainer [2019-10-15 01:34:07,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:07,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:07,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:07,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:07,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:06" (1/3) ... [2019-10-15 01:34:07,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd78279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:07, skipping insertion in model container [2019-10-15 01:34:07,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (2/3) ... [2019-10-15 01:34:07,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd78279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:07, skipping insertion in model container [2019-10-15 01:34:07,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:07" (3/3) ... [2019-10-15 01:34:07,479 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-1.i [2019-10-15 01:34:07,489 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:07,497 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:07,507 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:07,528 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:07,529 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:07,529 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:07,529 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:07,529 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:07,529 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:07,529 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:07,529 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:07,544 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 01:34:07,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:34:07,549 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:07,550 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:07,552 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:07,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:07,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2120380695, now seen corresponding path program 1 times [2019-10-15 01:34:07,568 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:07,568 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483098636] [2019-10-15 01:34:07,569 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:07,569 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:07,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:07,721 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 01:34:07,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483098636] [2019-10-15 01:34:07,723 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:07,724 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:07,724 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772101460] [2019-10-15 01:34:07,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:07,729 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:07,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:07,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:07,743 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 01:34:07,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:07,850 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2019-10-15 01:34:07,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:07,852 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-15 01:34:07,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:07,861 INFO L225 Difference]: With dead ends: 46 [2019-10-15 01:34:07,862 INFO L226 Difference]: Without dead ends: 26 [2019-10-15 01:34:07,865 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 01:34:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-15 01:34:07,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-15 01:34:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:34:07,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-10-15 01:34:07,905 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 16 [2019-10-15 01:34:07,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:07,906 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-10-15 01:34:07,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:07,907 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-10-15 01:34:07,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 01:34:07,908 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:07,908 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:07,908 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:07,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:07,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1248295838, now seen corresponding path program 1 times [2019-10-15 01:34:07,909 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:07,910 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307435237] [2019-10-15 01:34:07,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:07,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:07,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:34:08,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307435237] [2019-10-15 01:34:08,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434866345] [2019-10-15 01:34:08,008 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 01:34:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:08,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:08,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:34:08,109 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:34:08,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [996969006] [2019-10-15 01:34:08,175 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:34:08,175 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:08,182 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:08,191 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:08,192 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:08,423 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:09,709 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:09,754 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:09,764 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:10,372 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:10,372 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:34:10,372 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167998546] [2019-10-15 01:34:10,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:34:10,376 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:10,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:34:10,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:34:10,379 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 17 states. [2019-10-15 01:34:11,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:11,191 INFO L93 Difference]: Finished difference Result 72 states and 101 transitions. [2019-10-15 01:34:11,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:34:11,193 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2019-10-15 01:34:11,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:11,195 INFO L225 Difference]: With dead ends: 72 [2019-10-15 01:34:11,195 INFO L226 Difference]: Without dead ends: 53 [2019-10-15 01:34:11,197 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:34:11,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-15 01:34:11,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2019-10-15 01:34:11,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-15 01:34:11,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-10-15 01:34:11,216 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 22 [2019-10-15 01:34:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:11,221 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-10-15 01:34:11,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:34:11,221 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-10-15 01:34:11,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-15 01:34:11,222 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:11,223 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:11,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:11,429 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:11,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:11,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1543679785, now seen corresponding path program 2 times [2019-10-15 01:34:11,430 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:11,430 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262691096] [2019-10-15 01:34:11,431 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:11,431 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:11,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-15 01:34:11,591 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262691096] [2019-10-15 01:34:11,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297370250] [2019-10-15 01:34:11,592 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 01:34:11,688 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:34:11,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:11,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:34:11,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-15 01:34:11,708 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-15 01:34:11,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [747722673] [2019-10-15 01:34:11,766 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:34:11,767 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:11,767 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:11,767 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:11,768 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:11,797 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:12,638 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:12,658 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:12,663 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:13,388 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:13,389 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:34:13,389 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917663385] [2019-10-15 01:34:13,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:34:13,392 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:13,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:34:13,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:34:13,393 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 23 states. [2019-10-15 01:34:14,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:14,444 INFO L93 Difference]: Finished difference Result 123 states and 170 transitions. [2019-10-15 01:34:14,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:34:14,445 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2019-10-15 01:34:14,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:14,446 INFO L225 Difference]: With dead ends: 123 [2019-10-15 01:34:14,446 INFO L226 Difference]: Without dead ends: 89 [2019-10-15 01:34:14,448 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 92 SyntacticMatches, 25 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:34:14,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-15 01:34:14,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2019-10-15 01:34:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-15 01:34:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2019-10-15 01:34:14,472 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 40 [2019-10-15 01:34:14,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:14,472 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2019-10-15 01:34:14,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:34:14,472 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2019-10-15 01:34:14,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-15 01:34:14,480 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:14,480 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:14,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:14,692 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:14,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:14,693 INFO L82 PathProgramCache]: Analyzing trace with hash 376036471, now seen corresponding path program 3 times [2019-10-15 01:34:14,693 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:14,694 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080192073] [2019-10-15 01:34:14,694 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:14,694 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:14,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-10-15 01:34:14,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080192073] [2019-10-15 01:34:14,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737754529] [2019-10-15 01:34:14,947 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 01:34:15,090 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:34:15,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:15,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:34:15,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-10-15 01:34:15,140 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-10-15 01:34:15,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [217814736] [2019-10-15 01:34:15,358 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:34:15,358 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:15,358 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:15,359 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:15,359 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:15,393 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:15,936 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:15,941 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:15,944 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:17,120 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:17,120 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:34:17,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824698893] [2019-10-15 01:34:17,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:34:17,123 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:17,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:34:17,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:34:17,124 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 35 states. [2019-10-15 01:34:19,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:19,069 INFO L93 Difference]: Finished difference Result 225 states and 308 transitions. [2019-10-15 01:34:19,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:34:19,070 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2019-10-15 01:34:19,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:19,072 INFO L225 Difference]: With dead ends: 225 [2019-10-15 01:34:19,074 INFO L226 Difference]: Without dead ends: 161 [2019-10-15 01:34:19,078 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 153 SyntacticMatches, 55 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2932 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:34:19,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-10-15 01:34:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 152. [2019-10-15 01:34:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-10-15 01:34:19,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 158 transitions. [2019-10-15 01:34:19,124 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 158 transitions. Word has length 76 [2019-10-15 01:34:19,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:19,124 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 158 transitions. [2019-10-15 01:34:19,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:34:19,125 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 158 transitions. [2019-10-15 01:34:19,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-15 01:34:19,131 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:19,131 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:19,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:19,336 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:19,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:19,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1663159223, now seen corresponding path program 4 times [2019-10-15 01:34:19,337 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:19,338 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191817603] [2019-10-15 01:34:19,338 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:19,339 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:19,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2019-10-15 01:34:19,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191817603] [2019-10-15 01:34:19,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272834127] [2019-10-15 01:34:19,863 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 01:34:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:20,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:34:20,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2019-10-15 01:34:20,088 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2019-10-15 01:34:21,099 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1044568716] [2019-10-15 01:34:21,101 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:34:21,101 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:21,101 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:21,102 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:21,102 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:21,123 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:21,691 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:21,697 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:21,700 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:24,428 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:24,429 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:34:24,429 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302927702] [2019-10-15 01:34:24,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:34:24,431 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:24,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:34:24,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:34:24,433 INFO L87 Difference]: Start difference. First operand 152 states and 158 transitions. Second operand 59 states. [2019-10-15 01:34:29,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:29,543 INFO L93 Difference]: Finished difference Result 429 states and 584 transitions. [2019-10-15 01:34:29,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:34:29,544 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 148 [2019-10-15 01:34:29,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:29,546 INFO L225 Difference]: With dead ends: 429 [2019-10-15 01:34:29,546 INFO L226 Difference]: Without dead ends: 305 [2019-10-15 01:34:29,550 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 297 SyntacticMatches, 115 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10918 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:34:29,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2019-10-15 01:34:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 296. [2019-10-15 01:34:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2019-10-15 01:34:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 302 transitions. [2019-10-15 01:34:29,581 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 302 transitions. Word has length 148 [2019-10-15 01:34:29,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:29,581 INFO L462 AbstractCegarLoop]: Abstraction has 296 states and 302 transitions. [2019-10-15 01:34:29,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:34:29,581 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 302 transitions. [2019-10-15 01:34:29,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-10-15 01:34:29,587 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:29,587 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:29,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:29,798 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:29,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:29,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1615525321, now seen corresponding path program 5 times [2019-10-15 01:34:29,799 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:29,799 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039901098] [2019-10-15 01:34:29,800 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:29,800 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:29,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6486 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5405 trivial. 0 not checked. [2019-10-15 01:34:31,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039901098] [2019-10-15 01:34:31,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812620905] [2019-10-15 01:34:31,127 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