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-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:03:10,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:03:10,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:03:10,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:03:10,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:03:10,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:03:10,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:03:10,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:03:11,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:03:11,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:03:11,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:03:11,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:03:11,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:03:11,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:03:11,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:03:11,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:03:11,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:03:11,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:03:11,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:03:11,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:03:11,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:03:11,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:03:11,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:03:11,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:03:11,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:03:11,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:03:11,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:03:11,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:03:11,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:03:11,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:03:11,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:03:11,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:03:11,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:03:11,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:03:11,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:03:11,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:03:11,055 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:03:11,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:03:11,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:03:11,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:03:11,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:03:11,059 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 03:03:11,095 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:03:11,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:03:11,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:03:11,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:03:11,101 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:03:11,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:03:11,104 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:03:11,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:03:11,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:03:11,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:03:11,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:03:11,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:03:11,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:03:11,106 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:03:11,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:03:11,106 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:03:11,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:03:11,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:03:11,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:03:11,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:03:11,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:03:11,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:03:11,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:03:11,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:03:11,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:03:11,109 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:03:11,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:03:11,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:03:11,110 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 03:03:11,409 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:03:11,428 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:03:11,431 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:03:11,433 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:03:11,433 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:03:11,434 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2019-10-15 03:03:11,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3bc47931/398949e97abe42b39a22e105a012c97c/FLAG6d241528a [2019-10-15 03:03:12,009 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:03:12,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2019-10-15 03:03:12,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3bc47931/398949e97abe42b39a22e105a012c97c/FLAG6d241528a [2019-10-15 03:03:12,372 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3bc47931/398949e97abe42b39a22e105a012c97c [2019-10-15 03:03:12,384 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:03:12,385 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:03:12,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:12,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:03:12,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:03:12,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:12" (1/1) ... [2019-10-15 03:03:12,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60c38acc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12, skipping insertion in model container [2019-10-15 03:03:12,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:12" (1/1) ... [2019-10-15 03:03:12,407 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:03:12,426 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:03:12,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:12,599 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:03:12,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:12,637 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:03:12,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12 WrapperNode [2019-10-15 03:03:12,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:12,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:03:12,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:03:12,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:03:12,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (1/1) ... [2019-10-15 03:03:12,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (1/1) ... [2019-10-15 03:03:12,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (1/1) ... [2019-10-15 03:03:12,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (1/1) ... [2019-10-15 03:03:12,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (1/1) ... [2019-10-15 03:03:12,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (1/1) ... [2019-10-15 03:03:12,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (1/1) ... [2019-10-15 03:03:12,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:03:12,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:03:12,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:03:12,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:03:12,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (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 03:03:12,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:03:12,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:03:12,831 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:03:12,831 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:03:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:03:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 03:03:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:03:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:03:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:03:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:03:12,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:03:13,176 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:03:13,176 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:03:13,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:03:13 BoogieIcfgContainer [2019-10-15 03:03:13,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:03:13,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:03:13,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:03:13,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:03:13,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:03:12" (1/3) ... [2019-10-15 03:03:13,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3f4106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:03:13, skipping insertion in model container [2019-10-15 03:03:13,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (2/3) ... [2019-10-15 03:03:13,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3f4106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:03:13, skipping insertion in model container [2019-10-15 03:03:13,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:03:13" (3/3) ... [2019-10-15 03:03:13,187 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2019-10-15 03:03:13,197 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:03:13,206 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:03:13,218 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:03:13,246 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:03:13,246 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:03:13,246 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:03:13,246 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:03:13,247 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:03:13,247 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:03:13,247 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:03:13,248 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:03:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 03:03:13,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 03:03:13,299 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:13,300 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:13,302 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:13,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:13,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1974865403, now seen corresponding path program 1 times [2019-10-15 03:03:13,318 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:13,318 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352186923] [2019-10-15 03:03:13,318 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:13,319 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:13,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:13,793 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 03:03:13,793 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352186923] [2019-10-15 03:03:13,795 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:03:13,796 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:03:13,796 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770239629] [2019-10-15 03:03:13,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:03:13,802 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:13,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:03:13,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:03:13,818 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2019-10-15 03:03:13,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:13,983 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2019-10-15 03:03:13,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:03:13,985 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-10-15 03:03:13,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:13,996 INFO L225 Difference]: With dead ends: 39 [2019-10-15 03:03:13,996 INFO L226 Difference]: Without dead ends: 13 [2019-10-15 03:03:14,000 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:03:14,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-15 03:03:14,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-15 03:03:14,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-15 03:03:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-15 03:03:14,043 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-15 03:03:14,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:14,044 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-15 03:03:14,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:03:14,044 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-15 03:03:14,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 03:03:14,045 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:14,045 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:14,046 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:14,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1003106899, now seen corresponding path program 1 times [2019-10-15 03:03:14,046 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:14,047 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885564071] [2019-10-15 03:03:14,047 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:14,047 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:14,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:14,140 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 03:03:14,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885564071] [2019-10-15 03:03:14,144 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650289078] [2019-10-15 03:03:14,144 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 03:03:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:14,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 03:03:14,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:14,275 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 03:03:14,275 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:14,365 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:03:14,585 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2019-10-15 03:03:14,597 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 03:03:14,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [211571153] [2019-10-15 03:03:14,623 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:03:14,624 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:14,631 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:14,642 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:14,643 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:14,719 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:03:14,959 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:03:14,987 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:03:14,990 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:15,361 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:03:15,361 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 7, 7] total 18 [2019-10-15 03:03:15,361 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635553385] [2019-10-15 03:03:15,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 03:03:15,364 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:15,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 03:03:15,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:03:15,370 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 18 states. [2019-10-15 03:03:15,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:15,698 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2019-10-15 03:03:15,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-15 03:03:15,703 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 12 [2019-10-15 03:03:15,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:15,704 INFO L225 Difference]: With dead ends: 23 [2019-10-15 03:03:15,704 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 03:03:15,707 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2019-10-15 03:03:15,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 03:03:15,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 03:03:15,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 03:03:15,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-15 03:03:15,719 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2019-10-15 03:03:15,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:15,720 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-15 03:03:15,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 03:03:15,721 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-15 03:03:15,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 03:03:15,721 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:15,722 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:15,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:15,937 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:15,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:15,938 INFO L82 PathProgramCache]: Analyzing trace with hash 908654765, now seen corresponding path program 2 times [2019-10-15 03:03:15,938 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:15,938 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828530254] [2019-10-15 03:03:15,939 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:15,939 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:15,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:16,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828530254] [2019-10-15 03:03:16,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118704564] [2019-10-15 03:03:16,081 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 03:03:16,130 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:03:16,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:03:16,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-15 03:03:16,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:16,282 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:16,746 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2019-10-15 03:03:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:16,752 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [263212817] [2019-10-15 03:03:16,753 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:03:16,754 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:16,754 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:16,754 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:16,755 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:16,772 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:03:16,882 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:03:16,911 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:03:16,916 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:17,183 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:03:17,184 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9, 7] total 24 [2019-10-15 03:03:17,184 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580427562] [2019-10-15 03:03:17,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 03:03:17,186 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:17,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 03:03:17,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2019-10-15 03:03:17,187 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 24 states. [2019-10-15 03:03:18,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:18,012 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2019-10-15 03:03:18,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 03:03:18,013 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 14 [2019-10-15 03:03:18,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:18,014 INFO L225 Difference]: With dead ends: 27 [2019-10-15 03:03:18,014 INFO L226 Difference]: Without dead ends: 19 [2019-10-15 03:03:18,016 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 03:03:18,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-15 03:03:18,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-15 03:03:18,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 03:03:18,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-15 03:03:18,022 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2019-10-15 03:03:18,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:18,023 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-15 03:03:18,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 03:03:18,023 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-15 03:03:18,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 03:03:18,024 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:18,024 INFO L380 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:18,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:18,234 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:18,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:18,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1771893075, now seen corresponding path program 3 times [2019-10-15 03:03:18,235 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:18,236 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912157225] [2019-10-15 03:03:18,236 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:18,236 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:18,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:18,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912157225] [2019-10-15 03:03:18,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199535214] [2019-10-15 03:03:18,451 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 03:03:18,508 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:03:18,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:03:18,509 WARN L254 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-15 03:03:18,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:18,818 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:19,348 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 24 [2019-10-15 03:03:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:20,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694189172] [2019-10-15 03:03:20,082 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:03:20,082 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:20,083 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:20,083 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:20,083 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:20,099 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:03:20,176 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:03:20,193 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:03:20,196 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:20,542 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:03:20,542 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 13, 7] total 36 [2019-10-15 03:03:20,542 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047378920] [2019-10-15 03:03:20,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-15 03:03:20,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:20,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-15 03:03:20,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2019-10-15 03:03:20,545 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 36 states. [2019-10-15 03:03:21,432 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2019-10-15 03:03:21,614 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-10-15 03:03:21,793 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2019-10-15 03:03:22,021 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2019-10-15 03:03:22,257 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2019-10-15 03:03:22,490 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2019-10-15 03:03:22,644 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2019-10-15 03:03:22,814 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2019-10-15 03:03:23,182 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2019-10-15 03:03:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:23,208 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2019-10-15 03:03:23,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-15 03:03:23,208 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 18 [2019-10-15 03:03:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:23,209 INFO L225 Difference]: With dead ends: 31 [2019-10-15 03:03:23,209 INFO L226 Difference]: Without dead ends: 0 [2019-10-15 03:03:23,212 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=528, Invalid=2552, Unknown=0, NotChecked=0, Total=3080 [2019-10-15 03:03:23,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-15 03:03:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-15 03:03:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-15 03:03:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-15 03:03:23,213 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-10-15 03:03:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:23,213 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-15 03:03:23,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-15 03:03:23,213 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-15 03:03:23,214 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-15 03:03:23,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:23,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-15 03:03:23,611 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-15 03:03:23,612 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-15 03:03:23,612 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-15 03:03:23,612 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-15 03:03:23,612 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-15 03:03:23,612 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-15 03:03:23,612 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 22) the Hoare annotation is: true [2019-10-15 03:03:23,613 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 22) no Hoare annotation was computed. [2019-10-15 03:03:23,613 INFO L443 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2019-10-15 03:03:23,613 INFO L443 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2019-10-15 03:03:23,613 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 22) no Hoare annotation was computed. [2019-10-15 03:03:23,614 INFO L439 ceAbstractionStarter]: At program point L15-3(lines 15 19) the Hoare annotation is: (let ((.cse0 (* main_~i~0 (- 1)))) (and (<= 0 (+ main_~k~0 1000000)) (<= 0 main_~i~0) (or (= main_~n~0 main_~k~0) (< main_~i~0 (* 2 main_~k~0)) (< main_~k~0 0)) (<= main_~k~0 1000000) (< (+ main_~n~0 2) (div (+ .cse0 (- 6)) (- 2))) (< (div (+ .cse0 (- 8)) (- 2)) (+ main_~n~0 5)))) [2019-10-15 03:03:23,614 INFO L439 ceAbstractionStarter]: At program point L15-4(lines 15 19) the Hoare annotation is: (or (and (or (<= main_~n~0 0) (< main_~n~0 (+ main_~k~0 1))) (<= main_~k~0 main_~n~0)) (and (<= 0 main_~n~0) (<= 0 (+ main_~k~0 1000000)) (<= 0 main_~i~0) (< main_~k~0 0))) [2019-10-15 03:03:23,614 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-15 03:03:23,614 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-15 03:03:23,614 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-15 03:03:23,615 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-15 03:03:23,615 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-15 03:03:23,615 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-15 03:03:23,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 03:03:23 BoogieIcfgContainer [2019-10-15 03:03:23,634 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 03:03:23,636 INFO L168 Benchmark]: Toolchain (without parser) took 11250.40 ms. Allocated memory was 137.9 MB in the beginning and 290.5 MB in the end (delta: 152.6 MB). Free memory was 102.7 MB in the beginning and 100.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 155.2 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:23,637 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-15 03:03:23,638 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.00 ms. Allocated memory is still 137.9 MB. Free memory was 102.5 MB in the beginning and 92.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:23,639 INFO L168 Benchmark]: Boogie Preprocessor took 130.85 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 92.7 MB in the beginning and 181.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:23,640 INFO L168 Benchmark]: RCFGBuilder took 408.04 ms. Allocated memory is still 202.9 MB. Free memory was 181.2 MB in the beginning and 167.6 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:23,641 INFO L168 Benchmark]: TraceAbstraction took 10454.46 ms. Allocated memory was 202.9 MB in the beginning and 290.5 MB in the end (delta: 87.6 MB). Free memory was 167.6 MB in the beginning and 100.1 MB in the end (delta: 67.5 MB). Peak memory consumption was 155.0 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:23,645 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.00 ms. Allocated memory is still 137.9 MB. Free memory was 102.5 MB in the beginning and 92.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.85 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 92.7 MB in the beginning and 181.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 408.04 ms. Allocated memory is still 202.9 MB. Free memory was 181.2 MB in the beginning and 167.6 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10454.46 ms. Allocated memory was 202.9 MB in the beginning and 290.5 MB in the end (delta: 87.6 MB). Free memory was 167.6 MB in the beginning and 100.1 MB in the end (delta: 67.5 MB). Peak memory consumption was 155.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: ((((0 <= k + 1000000 && 0 <= i) && ((n == k || i < 2 * k) || k < 0)) && k <= 1000000) && n + 2 < (i * -1 + -6) / -2) && (i * -1 + -8) / -2 < n + 5 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Result: SAFE, OverallTime: 10.3s, OverallIterations: 4, TraceHistogramMax: 7, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 36 SDtfs, 71 SDslu, 318 SDs, 0 SdLazy, 413 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 197 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 7.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 32 NumberOfFragments, 80 HoareAnnotationTreeSize, 13 FomulaSimplifications, 639 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 441 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 133 ConstructedInterpolants, 0 QuantifiedInterpolants, 15273 SizeOfPredicates, 9 NumberOfNonLiveVariables, 140 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 0/105 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 643, ICFG_INTERPRETER_ENTERED_PROCEDURES: 12, DAG_INTERPRETER_EARLY_EXIT_QUERIES: 66, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 33, TOOLS_POST_TIME[ms]: 35, TOOLS_POST_CALL_APPLICATIONS: 15, TOOLS_POST_CALL_TIME[ms]: 14, TOOLS_POST_RETURN_APPLICATIONS: 6, TOOLS_POST_RETURN_TIME[ms]: 1, TOOLS_QUANTIFIERELIM_APPLICATIONS: 54, TOOLS_QUANTIFIERELIM_TIME[ms]: 37, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 5, FLUID_QUERY_TIME[ms]: 5, FLUID_QUERIES: 75, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 57, DOMAIN_JOIN_TIME[ms]: 368, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 6, DOMAIN_WIDEN_TIME[ms]: 68, DOMAIN_ISSUBSETEQ_APPLICATIONS: 9, DOMAIN_ISSUBSETEQ_TIME[ms]: 42, DOMAIN_ISBOTTOM_APPLICATIONS: 3, DOMAIN_ISBOTTOM_TIME[ms]: 4, LOOP_SUMMARIZER_APPLICATIONS: 3, LOOP_SUMMARIZER_CACHE_MISSES: 3, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 308, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 307, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 9, CALL_SUMMARIZER_APPLICATIONS: 6, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME[ms]: 21, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 21, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 6, PATH_EXPR_TIME[ms]: 5, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 25, DAG_COMPRESSION_PROCESSED_NODES: 186, DAG_COMPRESSION_RETAINED_NODES: 132, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...