/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/ssh-simplified/s3_srvr_1b.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:50:22,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:50:22,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:50:22,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:50:22,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:50:22,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:50:22,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:50:22,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:50:22,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:50:22,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:50:22,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:50:22,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:50:22,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:50:22,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:50:22,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:50:22,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:50:22,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:50:22,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:50:22,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:50:22,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:50:22,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:50:22,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:50:22,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:50:22,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:50:22,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:50:22,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:50:22,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:50:22,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:50:22,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:50:22,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:50:22,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:50:22,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:50:22,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:50:22,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:50:22,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:50:22,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:50:22,182 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 04:50:22,205 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:50:22,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:50:22,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:50:22,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:50:22,209 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:50:22,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:50:22,210 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:50:22,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:50:22,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:50:22,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:50:22,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:50:22,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:50:22,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:50:22,212 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:50:22,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:50:22,213 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:50:22,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:50:22,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:50:22,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:50:22,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:50:22,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:50:22,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:50:22,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:50:22,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:50:22,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:50:22,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:50:22,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:50:22,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:50:22,215 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 04:50:22,532 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:50:22,558 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:50:22,561 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:50:22,562 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:50:22,563 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:50:22,563 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2019-11-07 04:50:22,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca5f550a3/491edeeabfc547929dedb4226d0e4499/FLAGa63f72ad7 [2019-11-07 04:50:23,052 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:50:23,053 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2019-11-07 04:50:23,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca5f550a3/491edeeabfc547929dedb4226d0e4499/FLAGa63f72ad7 [2019-11-07 04:50:23,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca5f550a3/491edeeabfc547929dedb4226d0e4499 [2019-11-07 04:50:23,474 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:50:23,475 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:50:23,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:50:23,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:50:23,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:50:23,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:50:23" (1/1) ... [2019-11-07 04:50:23,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3f1635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:23, skipping insertion in model container [2019-11-07 04:50:23,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:50:23" (1/1) ... [2019-11-07 04:50:23,496 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:50:23,525 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:50:23,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:50:23,715 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:50:23,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:50:23,746 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:50:23,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:23 WrapperNode [2019-11-07 04:50:23,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:50:23,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:50:23,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:50:23,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:50:23,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:23" (1/1) ... [2019-11-07 04:50:23,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:23" (1/1) ... [2019-11-07 04:50:23,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:23" (1/1) ... [2019-11-07 04:50:23,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:23" (1/1) ... [2019-11-07 04:50:23,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:23" (1/1) ... [2019-11-07 04:50:23,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:23" (1/1) ... [2019-11-07 04:50:23,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:23" (1/1) ... [2019-11-07 04:50:23,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:50:23,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:50:23,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:50:23,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:50:23,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:23" (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 04:50:23,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:50:23,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:50:23,921 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:50:23,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:50:23,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-07 04:50:23,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:50:23,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-11-07 04:50:23,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-11-07 04:50:23,922 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:50:23,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:50:23,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:50:24,275 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:50:24,276 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 04:50:24,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:50:24 BoogieIcfgContainer [2019-11-07 04:50:24,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:50:24,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:50:24,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:50:24,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:50:24,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:50:23" (1/3) ... [2019-11-07 04:50:24,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bff6ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:50:24, skipping insertion in model container [2019-11-07 04:50:24,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:23" (2/3) ... [2019-11-07 04:50:24,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bff6ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:50:24, skipping insertion in model container [2019-11-07 04:50:24,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:50:24" (3/3) ... [2019-11-07 04:50:24,284 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_1b.cil.c [2019-11-07 04:50:24,294 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:50:24,301 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:50:24,310 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:50:24,331 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:50:24,331 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:50:24,331 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:50:24,332 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:50:24,332 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:50:24,332 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:50:24,332 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:50:24,332 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:50:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-07 04:50:24,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-07 04:50:24,350 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:24,351 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:24,352 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:24,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:24,357 INFO L82 PathProgramCache]: Analyzing trace with hash -2134687016, now seen corresponding path program 1 times [2019-11-07 04:50:24,364 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:24,364 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048569511] [2019-11-07 04:50:24,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:24,488 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 04:50:24,489 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048569511] [2019-11-07 04:50:24,490 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:24,490 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:24,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295161092] [2019-11-07 04:50:24,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:24,497 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:24,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:24,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:24,516 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-11-07 04:50:24,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:24,612 INFO L93 Difference]: Finished difference Result 52 states and 80 transitions. [2019-11-07 04:50:24,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:24,615 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-07 04:50:24,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:24,627 INFO L225 Difference]: With dead ends: 52 [2019-11-07 04:50:24,628 INFO L226 Difference]: Without dead ends: 27 [2019-11-07 04:50:24,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:24,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-07 04:50:24,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-07 04:50:24,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-07 04:50:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2019-11-07 04:50:24,680 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 8 [2019-11-07 04:50:24,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:24,680 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2019-11-07 04:50:24,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2019-11-07 04:50:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 04:50:24,682 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:24,682 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:24,683 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:24,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1122254586, now seen corresponding path program 1 times [2019-11-07 04:50:24,684 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:24,684 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637330565] [2019-11-07 04:50:24,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:50:24,751 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637330565] [2019-11-07 04:50:24,751 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074830124] [2019-11-07 04:50:24,751 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 04:50:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:24,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 04:50:24,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:50:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:50:24,837 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:50:24,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:50:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:50:24,874 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:50:24,874 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 5 [2019-11-07 04:50:24,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230229284] [2019-11-07 04:50:24,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:24,876 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:24,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:24,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:50:24,877 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 3 states. [2019-11-07 04:50:24,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:24,910 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2019-11-07 04:50:24,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:24,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-07 04:50:24,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:24,912 INFO L225 Difference]: With dead ends: 43 [2019-11-07 04:50:24,912 INFO L226 Difference]: Without dead ends: 41 [2019-11-07 04:50:24,913 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:50:24,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-07 04:50:24,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-07 04:50:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-07 04:50:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2019-11-07 04:50:24,924 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 11 [2019-11-07 04:50:24,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:24,924 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2019-11-07 04:50:24,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:24,925 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2019-11-07 04:50:24,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-07 04:50:24,926 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:24,926 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:25,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:50:25,129 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:25,130 INFO L82 PathProgramCache]: Analyzing trace with hash -696464287, now seen corresponding path program 1 times [2019-11-07 04:50:25,130 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:25,131 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550055307] [2019-11-07 04:50:25,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:50:25,194 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550055307] [2019-11-07 04:50:25,194 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636006163] [2019-11-07 04:50:25,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 04:50:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:25,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 04:50:25,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:50:25,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:50:25,238 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:50:25,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:50:25,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:50:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:50:25,288 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:50:25,288 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 7 [2019-11-07 04:50:25,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406683175] [2019-11-07 04:50:25,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:25,291 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:25,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:25,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:50:25,292 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 3 states. [2019-11-07 04:50:25,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:25,361 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2019-11-07 04:50:25,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:25,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-07 04:50:25,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:25,363 INFO L225 Difference]: With dead ends: 53 [2019-11-07 04:50:25,363 INFO L226 Difference]: Without dead ends: 51 [2019-11-07 04:50:25,364 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:50:25,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-07 04:50:25,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-11-07 04:50:25,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-07 04:50:25,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2019-11-07 04:50:25,376 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 17 [2019-11-07 04:50:25,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:25,377 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2019-11-07 04:50:25,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:25,378 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2019-11-07 04:50:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-07 04:50:25,379 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:25,379 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:25,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:50:25,584 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:25,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:25,584 INFO L82 PathProgramCache]: Analyzing trace with hash 710966102, now seen corresponding path program 1 times [2019-11-07 04:50:25,585 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:25,585 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024319374] [2019-11-07 04:50:25,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:50:25,649 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024319374] [2019-11-07 04:50:25,650 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:25,651 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:25,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088079153] [2019-11-07 04:50:25,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:25,652 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:25,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:25,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:25,652 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand 3 states. [2019-11-07 04:50:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:25,713 INFO L93 Difference]: Finished difference Result 105 states and 149 transitions. [2019-11-07 04:50:25,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:25,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-07 04:50:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:25,715 INFO L225 Difference]: With dead ends: 105 [2019-11-07 04:50:25,715 INFO L226 Difference]: Without dead ends: 43 [2019-11-07 04:50:25,716 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-07 04:50:25,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2019-11-07 04:50:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-07 04:50:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2019-11-07 04:50:25,727 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 19 [2019-11-07 04:50:25,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:25,727 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2019-11-07 04:50:25,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2019-11-07 04:50:25,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 04:50:25,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:25,730 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:25,730 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:25,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:25,732 INFO L82 PathProgramCache]: Analyzing trace with hash 697914301, now seen corresponding path program 1 times [2019-11-07 04:50:25,732 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:25,732 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098620654] [2019-11-07 04:50:25,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:50:25,783 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098620654] [2019-11-07 04:50:25,783 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:25,783 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:25,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663902453] [2019-11-07 04:50:25,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:25,785 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:25,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:25,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:25,785 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 3 states. [2019-11-07 04:50:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:25,850 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2019-11-07 04:50:25,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:25,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-07 04:50:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:25,852 INFO L225 Difference]: With dead ends: 67 [2019-11-07 04:50:25,852 INFO L226 Difference]: Without dead ends: 45 [2019-11-07 04:50:25,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:25,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-07 04:50:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-11-07 04:50:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-07 04:50:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2019-11-07 04:50:25,861 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 25 [2019-11-07 04:50:25,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:25,861 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2019-11-07 04:50:25,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2019-11-07 04:50:25,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-07 04:50:25,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:25,863 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:25,863 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:25,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:25,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1651754432, now seen corresponding path program 1 times [2019-11-07 04:50:25,864 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:25,864 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478483220] [2019-11-07 04:50:25,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:50:25,893 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478483220] [2019-11-07 04:50:25,894 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:25,894 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:25,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424731642] [2019-11-07 04:50:25,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:25,895 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:25,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:25,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:25,895 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 3 states. [2019-11-07 04:50:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:25,917 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2019-11-07 04:50:25,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:25,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-11-07 04:50:25,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:25,920 INFO L225 Difference]: With dead ends: 68 [2019-11-07 04:50:25,920 INFO L226 Difference]: Without dead ends: 0 [2019-11-07 04:50:25,921 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:25,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-07 04:50:25,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-07 04:50:25,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-07 04:50:25,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-07 04:50:25,924 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2019-11-07 04:50:25,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:25,924 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-07 04:50:25,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-07 04:50:25,925 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-07 04:50:25,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-07 04:50:26,133 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-11-07 04:50:26,133 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-07 04:50:26,133 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-07 04:50:26,134 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-07 04:50:26,134 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-07 04:50:26,134 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-07 04:50:26,134 INFO L439 ceAbstractionStarter]: At program point L97(lines 9 141) the Hoare annotation is: false [2019-11-07 04:50:26,134 INFO L443 ceAbstractionStarter]: For program point L93-1(lines 54 107) no Hoare annotation was computed. [2019-11-07 04:50:26,134 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 9 141) no Hoare annotation was computed. [2019-11-07 04:50:26,134 INFO L443 ceAbstractionStarter]: For program point L89-1(lines 54 107) no Hoare annotation was computed. [2019-11-07 04:50:26,134 INFO L443 ceAbstractionStarter]: For program point L19(line 19) no Hoare annotation was computed. [2019-11-07 04:50:26,135 INFO L443 ceAbstractionStarter]: For program point L78-1(lines 54 107) no Hoare annotation was computed. [2019-11-07 04:50:26,135 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 139) no Hoare annotation was computed. [2019-11-07 04:50:26,135 INFO L439 ceAbstractionStarter]: At program point L25(lines 25 128) the Hoare annotation is: (or (and (= 8640 main_~s__state~0) (not (= 0 main_~s__hit~0))) (and (<= 8640 main_~s__state~0) (< main_~blastFlag~0 5)) (<= main_~blastFlag~0 2)) [2019-11-07 04:50:26,135 INFO L439 ceAbstractionStarter]: At program point L50(lines 50 109) the Hoare annotation is: (< main_~blastFlag~0 5) [2019-11-07 04:50:26,135 INFO L439 ceAbstractionStarter]: At program point L46(lines 46 111) the Hoare annotation is: (or (and (= 8640 main_~s__state~0) (not (= 0 main_~s__hit~0))) (and (<= 8640 main_~s__state~0) (< main_~blastFlag~0 5)) (<= main_~blastFlag~0 2)) [2019-11-07 04:50:26,136 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 9 141) no Hoare annotation was computed. [2019-11-07 04:50:26,136 INFO L446 ceAbstractionStarter]: At program point L137(lines 9 141) the Hoare annotation is: true [2019-11-07 04:50:26,137 INFO L439 ceAbstractionStarter]: At program point L100(lines 18 135) the Hoare annotation is: (or (and (= 8640 main_~s__state~0) (not (= 0 main_~s__hit~0))) (and (<= 8640 main_~s__state~0) (< main_~blastFlag~0 5)) (<= main_~blastFlag~0 2)) [2019-11-07 04:50:26,137 INFO L443 ceAbstractionStarter]: For program point L96(lines 96 98) no Hoare annotation was computed. [2019-11-07 04:50:26,137 INFO L439 ceAbstractionStarter]: At program point L30(lines 30 125) the Hoare annotation is: (or (and (= 8640 main_~s__state~0) (not (= 0 main_~s__hit~0))) (and (<= 8640 main_~s__state~0) (< main_~blastFlag~0 5)) (<= main_~blastFlag~0 2)) [2019-11-07 04:50:26,137 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 9 141) the Hoare annotation is: true [2019-11-07 04:50:26,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 04:50:26 BoogieIcfgContainer [2019-11-07 04:50:26,158 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 04:50:26,162 INFO L168 Benchmark]: Toolchain (without parser) took 2684.52 ms. Allocated memory was 144.2 MB in the beginning and 232.8 MB in the end (delta: 88.6 MB). Free memory was 100.9 MB in the beginning and 169.0 MB in the end (delta: -68.1 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2019-11-07 04:50:26,164 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 144.2 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-07 04:50:26,166 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.79 ms. Allocated memory is still 144.2 MB. Free memory was 100.7 MB in the beginning and 90.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2019-11-07 04:50:26,171 INFO L168 Benchmark]: Boogie Preprocessor took 117.37 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 90.6 MB in the beginning and 179.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2019-11-07 04:50:26,173 INFO L168 Benchmark]: RCFGBuilder took 411.82 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 161.0 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. [2019-11-07 04:50:26,173 INFO L168 Benchmark]: TraceAbstraction took 1880.07 ms. Allocated memory was 201.3 MB in the beginning and 232.8 MB in the end (delta: 31.5 MB). Free memory was 160.3 MB in the beginning and 169.0 MB in the end (delta: -8.7 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2019-11-07 04:50:26,186 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 144.2 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.79 ms. Allocated memory is still 144.2 MB. Free memory was 100.7 MB in the beginning and 90.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.37 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 90.6 MB in the beginning and 179.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 411.82 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 161.0 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1880.07 ms. Allocated memory was 201.3 MB in the beginning and 232.8 MB in the end (delta: 31.5 MB). Free memory was 160.3 MB in the beginning and 169.0 MB in the end (delta: -8.7 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 139]: 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: 9]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: blastFlag < 5 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((8640 == s__state && !(0 == s__hit)) || (8640 <= s__state && blastFlag < 5)) || blastFlag <= 2 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: ((8640 == s__state && !(0 == s__hit)) || (8640 <= s__state && blastFlag < 5)) || blastFlag <= 2 - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((8640 == s__state && !(0 == s__hit)) || (8640 <= s__state && blastFlag < 5)) || blastFlag <= 2 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: ((8640 == s__state && !(0 == s__hit)) || (8640 <= s__state && blastFlag < 5)) || blastFlag <= 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Result: SAFE, OverallTime: 1.8s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, HoareTripleCheckerStatistics: 125 SDtfs, 34 SDslu, 73 SDs, 0 SdLazy, 74 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=3, 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, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 11 PreInvPairs, 43 NumberOfFragments, 85 HoareAnnotationTreeSize, 11 FomulaSimplifications, 324 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 28 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 139 NumberOfCodeBlocks, 139 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 157 ConstructedInterpolants, 0 QuantifiedInterpolants, 5153 SizeOfPredicates, 2 NumberOfNonLiveVariables, 64 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 51/61 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...