/usr/bin/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-fb55353 [2019-11-07 04:02:33,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:02:33,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:02:33,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:02:33,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:02:33,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:02:33,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:02:33,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:02:33,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:02:33,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:02:33,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:02:33,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:02:33,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:02:33,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:02:33,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:02:33,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:02:33,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:02:33,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:02:33,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:02:33,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:02:33,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:02:33,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:02:33,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:02:33,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:02:33,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:02:33,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:02:33,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:02:33,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:02:33,191 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 [2019-11-07 04:02:33,206 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:02:33,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:02:33,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:02:33,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:02:33,210 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:02:33,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:02:33,210 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:02:33,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:02:33,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:02:33,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:02:33,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:02:33,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:02:33,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:02:33,212 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:02:33,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:02:33,213 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:02:33,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:02:33,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:02:33,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:02:33,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:02:33,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:02:33,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:02:33,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:02:33,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:02:33,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:02:33,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:02:33,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:02:33,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:02:33,217 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 [2019-11-07 04:02:33,569 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:02:33,583 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:02:33,586 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:02:33,588 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:02:33,588 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:02:33,589 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2019-11-07 04:02:33,652 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33e09745a/91c60657e0334826bb5f70f0fc1c9e01/FLAG480680b23 [2019-11-07 04:02:34,046 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:02:34,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2019-11-07 04:02:34,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33e09745a/91c60657e0334826bb5f70f0fc1c9e01/FLAG480680b23 [2019-11-07 04:02:34,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33e09745a/91c60657e0334826bb5f70f0fc1c9e01 [2019-11-07 04:02:34,492 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:02:34,507 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:02:34,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:02:34,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:02:34,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:02:34,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:02:34" (1/1) ... [2019-11-07 04:02:34,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77e9f379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:34, skipping insertion in model container [2019-11-07 04:02:34,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:02:34" (1/1) ... [2019-11-07 04:02:34,555 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:02:34,594 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:02:34,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:02:34,838 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:02:34,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:02:34,877 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:02:34,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:34 WrapperNode [2019-11-07 04:02:34,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:02:34,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:02:34,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:02:34,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:02:34,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:34" (1/1) ... [2019-11-07 04:02:34,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:34" (1/1) ... [2019-11-07 04:02:34,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:34" (1/1) ... [2019-11-07 04:02:34,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:34" (1/1) ... [2019-11-07 04:02:34,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:34" (1/1) ... [2019-11-07 04:02:34,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:34" (1/1) ... [2019-11-07 04:02:34,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:34" (1/1) ... [2019-11-07 04:02:34,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:02:34,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:02:34,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:02:34,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:02:34,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:34" (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 [2019-11-07 04:02:35,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:02:35,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:02:35,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 04:02:35,055 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:02:35,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:02:35,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 04:02:35,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 04:02:35,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:02:35,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:02:35,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:02:35,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:02:35,316 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:02:35,316 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 04:02:35,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:02:35 BoogieIcfgContainer [2019-11-07 04:02:35,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:02:35,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:02:35,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:02:35,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:02:35,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:02:34" (1/3) ... [2019-11-07 04:02:35,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba43eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:02:35, skipping insertion in model container [2019-11-07 04:02:35,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:34" (2/3) ... [2019-11-07 04:02:35,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba43eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:02:35, skipping insertion in model container [2019-11-07 04:02:35,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:02:35" (3/3) ... [2019-11-07 04:02:35,333 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2019-11-07 04:02:35,355 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:02:35,366 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:02:35,384 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:02:35,409 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:02:35,409 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:02:35,409 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:02:35,409 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:02:35,409 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:02:35,410 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:02:35,410 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:02:35,410 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:02:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-07 04:02:35,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 04:02:35,433 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:02:35,434 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:02:35,435 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:02:35,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:02:35,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1974865403, now seen corresponding path program 1 times [2019-11-07 04:02:35,448 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:02:35,448 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79425514] [2019-11-07 04:02:35,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:02:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:02:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:02:35,794 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79425514] [2019-11-07 04:02:35,795 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:02:35,796 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 04:02:35,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759207847] [2019-11-07 04:02:35,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 04:02:35,804 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:02:35,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 04:02:35,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:02:35,822 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2019-11-07 04:02:35,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:02:35,984 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2019-11-07 04:02:35,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 04:02:35,986 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-11-07 04:02:35,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:02:35,998 INFO L225 Difference]: With dead ends: 39 [2019-11-07 04:02:35,998 INFO L226 Difference]: Without dead ends: 13 [2019-11-07 04:02:36,004 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-07 04:02:36,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-07 04:02:36,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-07 04:02:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-07 04:02:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-11-07 04:02:36,053 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-11-07 04:02:36,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:02:36,053 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-11-07 04:02:36,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 04:02:36,054 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-11-07 04:02:36,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 04:02:36,056 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:02:36,056 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:02:36,056 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:02:36,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:02:36,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1003106899, now seen corresponding path program 1 times [2019-11-07 04:02:36,057 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:02:36,058 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756217066] [2019-11-07 04:02:36,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:02:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:02:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:02:36,154 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756217066] [2019-11-07 04:02:36,156 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022246896] [2019-11-07 04:02:36,156 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 [2019-11-07 04:02:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:02:36,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-07 04:02:36,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:02:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:02:36,255 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:02:36,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:02:36,499 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2019-11-07 04:02:36,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:02:36,512 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [267859349] [2019-11-07 04:02:36,552 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-07 04:02:36,552 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:02:36,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:02:36,573 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:02:36,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:02:36,632 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-11-07 04:02:36,738 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 04:02:36,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-11-07 04:02:36,744 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:02:36,902 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:02:36,902 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 7, 7] total 18 [2019-11-07 04:02:36,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442113079] [2019-11-07 04:02:36,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 04:02:36,904 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:02:36,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 04:02:36,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-11-07 04:02:36,905 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 18 states. [2019-11-07 04:02:37,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:02:37,201 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2019-11-07 04:02:37,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-07 04:02:37,202 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 12 [2019-11-07 04:02:37,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:02:37,203 INFO L225 Difference]: With dead ends: 23 [2019-11-07 04:02:37,203 INFO L226 Difference]: Without dead ends: 15 [2019-11-07 04:02:37,205 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2019-11-07 04:02:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-07 04:02:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-07 04:02:37,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-07 04:02:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-07 04:02:37,216 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2019-11-07 04:02:37,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:02:37,217 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-07 04:02:37,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 04:02:37,217 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-07 04:02:37,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 04:02:37,217 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:02:37,218 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:02:37,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:02:37,424 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:02:37,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:02:37,426 INFO L82 PathProgramCache]: Analyzing trace with hash 908654765, now seen corresponding path program 2 times [2019-11-07 04:02:37,426 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:02:37,426 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105321010] [2019-11-07 04:02:37,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:02:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:02:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:02:37,552 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105321010] [2019-11-07 04:02:37,552 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667183108] [2019-11-07 04:02:37,553 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 [2019-11-07 04:02:37,589 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 04:02:37,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:02:37,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-07 04:02:37,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:02:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:02:37,691 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:02:38,046 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2019-11-07 04:02:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:02:38,055 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1179530915] [2019-11-07 04:02:38,056 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-07 04:02:38,056 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:02:38,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:02:38,057 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:02:38,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:02:38,066 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-11-07 04:02:38,162 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 04:02:38,170 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-11-07 04:02:38,171 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:02:38,306 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:02:38,307 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9, 7] total 24 [2019-11-07 04:02:38,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954721189] [2019-11-07 04:02:38,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-07 04:02:38,308 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:02:38,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-07 04:02:38,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2019-11-07 04:02:38,309 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 24 states. [2019-11-07 04:02:38,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:02:38,852 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2019-11-07 04:02:38,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 04:02:38,859 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 14 [2019-11-07 04:02:38,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:02:38,860 INFO L225 Difference]: With dead ends: 27 [2019-11-07 04:02:38,860 INFO L226 Difference]: Without dead ends: 19 [2019-11-07 04:02:38,861 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2019-11-07 04:02:38,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-07 04:02:38,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-07 04:02:38,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-07 04:02:38,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-11-07 04:02:38,867 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2019-11-07 04:02:38,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:02:38,867 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-11-07 04:02:38,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-07 04:02:38,868 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-11-07 04:02:38,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 04:02:38,868 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:02:38,868 INFO L410 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:02:39,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:02:39,072 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:02:39,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:02:39,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1771893075, now seen corresponding path program 3 times [2019-11-07 04:02:39,073 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:02:39,073 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431429714] [2019-11-07 04:02:39,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:02:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:02:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:02:39,309 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431429714] [2019-11-07 04:02:39,309 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918325884] [2019-11-07 04:02:39,309 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 [2019-11-07 04:02:39,361 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 04:02:39,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:02:39,363 WARN L254 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-07 04:02:39,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:02:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:02:39,606 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:02:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:02:40,687 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355656691] [2019-11-07 04:02:40,688 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-07 04:02:40,688 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:02:40,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:02:40,689 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:02:40,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:02:40,704 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-11-07 04:02:40,739 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 04:02:40,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-11-07 04:02:40,744 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:02:40,920 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:02:40,920 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 13, 7] total 36 [2019-11-07 04:02:40,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42185230] [2019-11-07 04:02:40,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-07 04:02:40,922 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:02:40,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-07 04:02:40,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2019-11-07 04:02:40,923 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 36 states. [2019-11-07 04:02:41,636 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2019-11-07 04:02:41,805 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2019-11-07 04:02:42,179 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2019-11-07 04:02:42,350 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2019-11-07 04:02:42,560 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-11-07 04:02:42,834 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2019-11-07 04:02:42,975 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2019-11-07 04:02:43,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:02:43,138 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2019-11-07 04:02:43,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-07 04:02:43,139 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 18 [2019-11-07 04:02:43,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:02:43,140 INFO L225 Difference]: With dead ends: 31 [2019-11-07 04:02:43,140 INFO L226 Difference]: Without dead ends: 0 [2019-11-07 04:02:43,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=528, Invalid=2552, Unknown=0, NotChecked=0, Total=3080 [2019-11-07 04:02:43,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-07 04:02:43,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-07 04:02:43,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-07 04:02:43,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-07 04:02:43,145 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-11-07 04:02:43,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:02:43,145 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-07 04:02:43,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-07 04:02:43,145 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-07 04:02:43,146 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-07 04:02:43,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:02:43,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-07 04:02:43,582 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-11-07 04:02:43,582 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-07 04:02:43,582 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-07 04:02:43,582 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-07 04:02:43,583 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-07 04:02:43,583 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-07 04:02:43,583 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 22) the Hoare annotation is: true [2019-11-07 04:02:43,583 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 22) no Hoare annotation was computed. [2019-11-07 04:02:43,583 INFO L443 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2019-11-07 04:02:43,583 INFO L443 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2019-11-07 04:02:43,583 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 22) no Hoare annotation was computed. [2019-11-07 04:02:43,584 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)))) [2019-11-07 04:02:43,584 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))) [2019-11-07 04:02:43,584 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-11-07 04:02:43,584 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-11-07 04:02:43,584 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-07 04:02:43,584 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-07 04:02:43,585 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-07 04:02:43,585 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-11-07 04:02:43,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 04:02:43 BoogieIcfgContainer [2019-11-07 04:02:43,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 04:02:43,607 INFO L168 Benchmark]: Toolchain (without parser) took 9113.61 ms. Allocated memory was 143.1 MB in the beginning and 286.3 MB in the end (delta: 143.1 MB). Free memory was 108.6 MB in the beginning and 236.4 MB in the end (delta: -127.8 MB). Peak memory consumption was 147.0 MB. Max. memory is 7.1 GB. [2019-11-07 04:02:43,609 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 143.1 MB. Free memory was 126.3 MB in the beginning and 126.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-11-07 04:02:43,610 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.88 ms. Allocated memory is still 143.1 MB. Free memory was 108.4 MB in the beginning and 99.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-11-07 04:02:43,611 INFO L168 Benchmark]: Boogie Preprocessor took 110.36 ms. Allocated memory was 143.1 MB in the beginning and 202.9 MB in the end (delta: 59.8 MB). Free memory was 99.0 MB in the beginning and 181.5 MB in the end (delta: -82.5 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2019-11-07 04:02:43,612 INFO L168 Benchmark]: RCFGBuilder took 327.78 ms. Allocated memory is still 202.9 MB. Free memory was 181.5 MB in the beginning and 167.5 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2019-11-07 04:02:43,614 INFO L168 Benchmark]: TraceAbstraction took 8283.48 ms. Allocated memory was 202.9 MB in the beginning and 286.3 MB in the end (delta: 83.4 MB). Free memory was 166.9 MB in the beginning and 236.4 MB in the end (delta: -69.5 MB). Peak memory consumption was 145.5 MB. Max. memory is 7.1 GB. [2019-11-07 04:02:43,626 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 143.1 MB. Free memory was 126.3 MB in the beginning and 126.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 363.88 ms. Allocated memory is still 143.1 MB. Free memory was 108.4 MB in the beginning and 99.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.36 ms. Allocated memory was 143.1 MB in the beginning and 202.9 MB in the end (delta: 59.8 MB). Free memory was 99.0 MB in the beginning and 181.5 MB in the end (delta: -82.5 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 327.78 ms. Allocated memory is still 202.9 MB. Free memory was 181.5 MB in the beginning and 167.5 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8283.48 ms. Allocated memory was 202.9 MB in the beginning and 286.3 MB in the end (delta: 83.4 MB). Free memory was 166.9 MB in the beginning and 236.4 MB in the end (delta: -69.5 MB). Peak memory consumption was 145.5 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: 8.1s, OverallIterations: 4, TraceHistogramMax: 7, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, HoareTripleCheckerStatistics: 36 SDtfs, 71 SDslu, 318 SDs, 0 SdLazy, 413 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 197 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 5.2s 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, 625 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 414 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 133 ConstructedInterpolants, 0 QuantifiedInterpolants, 15545 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]: 364, ICFG_INTERPRETER_ENTERED_PROCEDURES: 12, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 33, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 31, TOOLS_POST_TIME[ms]: 31, 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: 52, TOOLS_QUANTIFIERELIM_TIME[ms]: 32, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 6, FLUID_QUERY_TIME[ms]: 5, FLUID_QUERIES: 117, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 6, DOMAIN_JOIN_TIME[ms]: 17, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 4, DOMAIN_WIDEN_TIME[ms]: 126, DOMAIN_ISSUBSETEQ_APPLICATIONS: 7, DOMAIN_ISSUBSETEQ_TIME[ms]: 30, DOMAIN_ISBOTTOM_APPLICATIONS: 33, DOMAIN_ISBOTTOM_TIME[ms]: 38, LOOP_SUMMARIZER_APPLICATIONS: 3, LOOP_SUMMARIZER_CACHE_MISSES: 3, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 186, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 185, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 7, CALL_SUMMARIZER_APPLICATIONS: 6, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME[ms]: 6, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 6, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 7, PATH_EXPR_TIME[ms]: 4, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 22, DAG_COMPRESSION_PROCESSED_NODES: 189, DAG_COMPRESSION_RETAINED_NODES: 135, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...