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/loop-acceleration/array_2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:00:57,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:00:57,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:00:57,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:00:57,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:00:57,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:00:57,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:00:57,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:00:57,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:00:57,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:00:57,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:00:57,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:00:57,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:00:57,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:00:57,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:00:57,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:00:57,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:00:57,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:00:57,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:00:57,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:00:57,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:00:57,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:00:57,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:00:57,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:00:57,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:00:57,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:00:57,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:00:57,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:00:57,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:00:57,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:00:57,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:00:57,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:00:57,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:00:57,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:00:57,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:00:57,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:00:57,514 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 03:00:57,540 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:00:57,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:00:57,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:00:57,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:00:57,542 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:00:57,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:00:57,542 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:00:57,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:00:57,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:00:57,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:00:57,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:00:57,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:00:57,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:00:57,544 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:00:57,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:00:57,544 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:00:57,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:00:57,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:00:57,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:00:57,545 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:00:57,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:00:57,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:00:57,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:00:57,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:00:57,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:00:57,546 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:00:57,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:00:57,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:00:57,547 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 03:00:57,831 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:00:57,846 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:00:57,850 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:00:57,852 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:00:57,852 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:00:57,853 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2.i [2019-10-15 03:00:57,929 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61f3c792f/8ea95d721cb142e4a0eb559351618587/FLAG5aeaf2a95 [2019-10-15 03:00:58,411 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:00:58,413 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2.i [2019-10-15 03:00:58,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61f3c792f/8ea95d721cb142e4a0eb559351618587/FLAG5aeaf2a95 [2019-10-15 03:00:58,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61f3c792f/8ea95d721cb142e4a0eb559351618587 [2019-10-15 03:00:58,784 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:00:58,785 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:00:58,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:00:58,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:00:58,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:00:58,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:00:58" (1/1) ... [2019-10-15 03:00:58,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fa71a5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:58, skipping insertion in model container [2019-10-15 03:00:58,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:00:58" (1/1) ... [2019-10-15 03:00:58,801 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:00:58,816 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:00:58,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:00:58,994 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:00:59,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:00:59,031 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:00:59,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59 WrapperNode [2019-10-15 03:00:59,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:00:59,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:00:59,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:00:59,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:00:59,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (1/1) ... [2019-10-15 03:00:59,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (1/1) ... [2019-10-15 03:00:59,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (1/1) ... [2019-10-15 03:00:59,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (1/1) ... [2019-10-15 03:00:59,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (1/1) ... [2019-10-15 03:00:59,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (1/1) ... [2019-10-15 03:00:59,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (1/1) ... [2019-10-15 03:00:59,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:00:59,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:00:59,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:00:59,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:00:59,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (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 03:00:59,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:00:59,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:00:59,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:00:59,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:00:59,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:00:59,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:00:59,209 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:00:59,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:00:59,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:00:59,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:00:59,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:00:59,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:00:59,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:00:59,463 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:00:59,464 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:00:59,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:00:59 BoogieIcfgContainer [2019-10-15 03:00:59,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:00:59,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:00:59,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:00:59,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:00:59,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:00:58" (1/3) ... [2019-10-15 03:00:59,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3033c249 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:00:59, skipping insertion in model container [2019-10-15 03:00:59,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (2/3) ... [2019-10-15 03:00:59,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3033c249 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:00:59, skipping insertion in model container [2019-10-15 03:00:59,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:00:59" (3/3) ... [2019-10-15 03:00:59,488 INFO L109 eAbstractionObserver]: Analyzing ICFG array_2-2.i [2019-10-15 03:00:59,506 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:00:59,531 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:00:59,555 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:00:59,589 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:00:59,589 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:00:59,590 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:00:59,590 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:00:59,590 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:00:59,590 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:00:59,590 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:00:59,590 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:00:59,616 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-10-15 03:00:59,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 03:00:59,622 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:59,623 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:59,625 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:59,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:59,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1959451811, now seen corresponding path program 1 times [2019-10-15 03:00:59,638 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:59,638 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173439473] [2019-10-15 03:00:59,639 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:59,639 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:59,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:59,800 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 03:00:59,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173439473] [2019-10-15 03:00:59,802 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:00:59,802 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:00:59,803 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903046930] [2019-10-15 03:00:59,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:00:59,809 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:59,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:00:59,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:00:59,828 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-10-15 03:00:59,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:59,869 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-10-15 03:00:59,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:00:59,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-15 03:00:59,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:59,879 INFO L225 Difference]: With dead ends: 29 [2019-10-15 03:00:59,879 INFO L226 Difference]: Without dead ends: 12 [2019-10-15 03:00:59,883 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 03:00:59,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-15 03:00:59,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-15 03:00:59,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-15 03:00:59,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-15 03:00:59,920 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-15 03:00:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:59,921 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-15 03:00:59,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:00:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-15 03:00:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 03:00:59,922 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:59,922 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:59,923 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:59,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:59,924 INFO L82 PathProgramCache]: Analyzing trace with hash 504932467, now seen corresponding path program 1 times [2019-10-15 03:00:59,924 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:59,924 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733067691] [2019-10-15 03:00:59,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:59,925 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:59,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:00,014 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 03:01:00,014 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733067691] [2019-10-15 03:01:00,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416460123] [2019-10-15 03:01:00,015 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 03:01:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:00,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:01:00,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:00,100 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 03:01:00,101 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:00,149 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 03:01:00,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [607651844] [2019-10-15 03:01:00,175 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:01:00,175 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:00,182 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:00,191 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:00,192 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:00,440 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:00,893 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-10-15 03:01:00,910 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:00,918 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:01,402 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:01,402 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 9] total 16 [2019-10-15 03:01:01,403 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617540320] [2019-10-15 03:01:01,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-15 03:01:01,408 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:01,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-15 03:01:01,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-10-15 03:01:01,412 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 16 states. [2019-10-15 03:01:02,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:02,327 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-10-15 03:01:02,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 03:01:02,328 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 11 [2019-10-15 03:01:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:02,328 INFO L225 Difference]: With dead ends: 20 [2019-10-15 03:01:02,329 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 03:01:02,330 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2019-10-15 03:01:02,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 03:01:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 03:01:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 03:01:02,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-15 03:01:02,339 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2019-10-15 03:01:02,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:02,339 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-15 03:01:02,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-15 03:01:02,340 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-15 03:01:02,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 03:01:02,341 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:02,341 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:02,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:02,543 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:02,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:02,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1070026915, now seen corresponding path program 2 times [2019-10-15 03:01:02,544 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:02,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553686279] [2019-10-15 03:01:02,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:02,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:02,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:02,653 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 03:01:02,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553686279] [2019-10-15 03:01:02,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292926203] [2019-10-15 03:01:02,654 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 03:01:02,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:01:02,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:01:02,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:01:02,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:02,723 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 03:01:02,724 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:02,795 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 03:01:02,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [565414265] [2019-10-15 03:01:02,797 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:01:02,798 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:02,798 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:02,799 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:02,799 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:02,832 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:03,152 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-10-15 03:01:03,172 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:03,181 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:03,590 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:03,591 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 9] total 22 [2019-10-15 03:01:03,591 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708386456] [2019-10-15 03:01:03,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 03:01:03,594 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:03,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 03:01:03,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2019-10-15 03:01:03,596 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 22 states. [2019-10-15 03:01:04,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:04,452 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-10-15 03:01:04,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 03:01:04,453 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 14 [2019-10-15 03:01:04,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:04,454 INFO L225 Difference]: With dead ends: 26 [2019-10-15 03:01:04,454 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:01:04,455 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=300, Invalid=1106, Unknown=0, NotChecked=0, Total=1406 [2019-10-15 03:01:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:01:04,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 03:01:04,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:01:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-10-15 03:01:04,462 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2019-10-15 03:01:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:04,462 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-10-15 03:01:04,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 03:01:04,462 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-10-15 03:01:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 03:01:04,463 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:04,463 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:04,667 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:04,668 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:04,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:04,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1928773981, now seen corresponding path program 3 times [2019-10-15 03:01:04,669 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:04,669 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456091107] [2019-10-15 03:01:04,669 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:04,669 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:04,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:04,874 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 03:01:04,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456091107] [2019-10-15 03:01:04,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905132909] [2019-10-15 03:01:04,875 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 03:01:04,943 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:01:04,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:01:04,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 03:01:04,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:04,962 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 03:01:04,963 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:05,166 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 03:01:05,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1396325771] [2019-10-15 03:01:05,168 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:01:05,168 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:05,169 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:05,169 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:05,169 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:05,202 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:05,393 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-10-15 03:01:05,422 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:05,436 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:05,945 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:05,946 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 9] total 34 [2019-10-15 03:01:05,946 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571957401] [2019-10-15 03:01:05,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-15 03:01:05,947 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:05,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-15 03:01:05,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=797, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 03:01:05,949 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 34 states. [2019-10-15 03:01:07,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:07,654 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2019-10-15 03:01:07,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-15 03:01:07,654 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 20 [2019-10-15 03:01:07,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:07,655 INFO L225 Difference]: With dead ends: 38 [2019-10-15 03:01:07,655 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 03:01:07,657 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=966, Invalid=2816, Unknown=0, NotChecked=0, Total=3782 [2019-10-15 03:01:07,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 03:01:07,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-15 03:01:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 03:01:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-10-15 03:01:07,666 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2019-10-15 03:01:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:07,666 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-10-15 03:01:07,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-15 03:01:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-10-15 03:01:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 03:01:07,667 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:07,668 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:07,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:07,872 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:07,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:07,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1953340067, now seen corresponding path program 4 times [2019-10-15 03:01:07,873 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:07,874 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698869337] [2019-10-15 03:01:07,874 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:07,875 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:07,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:08,241 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 03:01:08,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698869337] [2019-10-15 03:01:08,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662871178] [2019-10-15 03:01:08,242 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 03:01:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:08,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 03:01:08,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:08,347 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 03:01:08,348 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:09,074 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 03:01:09,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2052862062] [2019-10-15 03:01:09,076 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:01:09,076 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:09,077 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:09,077 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:09,077 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:09,104 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:09,294 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-10-15 03:01:09,309 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:09,315 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:09,908 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:09,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 9] total 58 [2019-10-15 03:01:09,909 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635635999] [2019-10-15 03:01:09,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-10-15 03:01:09,911 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:09,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-10-15 03:01:09,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1201, Invalid=2105, Unknown=0, NotChecked=0, Total=3306 [2019-10-15 03:01:09,914 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 58 states. [2019-10-15 03:01:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:13,258 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2019-10-15 03:01:13,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-10-15 03:01:13,260 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 32 [2019-10-15 03:01:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:13,261 INFO L225 Difference]: With dead ends: 62 [2019-10-15 03:01:13,262 INFO L226 Difference]: Without dead ends: 57 [2019-10-15 03:01:13,265 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2554 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3594, Invalid=8396, Unknown=0, NotChecked=0, Total=11990 [2019-10-15 03:01:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-15 03:01:13,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-10-15 03:01:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-15 03:01:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-10-15 03:01:13,277 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2019-10-15 03:01:13,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:13,278 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-10-15 03:01:13,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-10-15 03:01:13,278 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-10-15 03:01:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-15 03:01:13,279 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:13,280 INFO L380 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:13,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:13,484 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:13,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:13,484 INFO L82 PathProgramCache]: Analyzing trace with hash -751283549, now seen corresponding path program 5 times [2019-10-15 03:01:13,485 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:13,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023183530] [2019-10-15 03:01:13,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:13,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:13,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:14,620 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 03:01:14,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023183530] [2019-10-15 03:01:14,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944486029] [2019-10-15 03:01:14,621 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