java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-2-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-1377b90 [2019-01-07 14:15:41,104 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-07 14:15:41,108 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-07 14:15:41,123 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-07 14:15:41,123 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-07 14:15:41,125 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-07 14:15:41,126 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-07 14:15:41,128 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-07 14:15:41,130 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-07 14:15:41,131 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-07 14:15:41,132 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-07 14:15:41,132 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-07 14:15:41,133 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-07 14:15:41,134 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-07 14:15:41,135 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-07 14:15:41,136 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-07 14:15:41,137 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-07 14:15:41,140 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-07 14:15:41,142 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-07 14:15:41,143 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-07 14:15:41,144 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-07 14:15:41,146 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-07 14:15:41,150 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-07 14:15:41,151 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-07 14:15:41,151 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-07 14:15:41,152 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-07 14:15:41,152 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-07 14:15:41,155 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-07 14:15:41,156 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-07 14:15:41,157 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-07 14:15:41,157 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-07 14:15:41,159 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-07 14:15:41,160 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-07 14:15:41,160 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-07 14:15:41,161 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-07 14:15:41,161 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-07 14:15:41,162 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-01-07 14:15:41,183 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-07 14:15:41,184 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-07 14:15:41,184 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-07 14:15:41,187 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-07 14:15:41,188 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-07 14:15:41,188 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-07 14:15:41,188 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-07 14:15:41,188 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-07 14:15:41,188 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-07 14:15:41,189 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-07 14:15:41,189 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-07 14:15:41,189 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-07 14:15:41,189 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-07 14:15:41,189 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-07 14:15:41,190 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-07 14:15:41,191 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-07 14:15:41,191 INFO L133 SettingsManager]: * Use SBE=true [2019-01-07 14:15:41,191 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-07 14:15:41,191 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-07 14:15:41,191 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-07 14:15:41,192 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-07 14:15:41,192 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-07 14:15:41,192 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-07 14:15:41,192 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-07 14:15:41,192 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-07 14:15:41,192 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-07 14:15:41,194 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-07 14:15:41,194 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-07 14:15:41,195 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-07 14:15:41,195 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-07 14:15:41,195 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-07 14:15:41,195 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-07 14:15:41,195 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-07 14:15:41,196 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-07 14:15:41,196 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-07 14:15:41,196 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-07 14:15:41,196 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-07 14:15:41,196 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-07 14:15:41,197 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-07 14:15:41,197 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-07 14:15:41,247 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-07 14:15:41,260 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-07 14:15:41,265 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-07 14:15:41,267 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-07 14:15:41,267 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-07 14:15:41,268 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-2-unlimited.bpl [2019-01-07 14:15:41,269 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-2-unlimited.bpl' [2019-01-07 14:15:41,320 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-07 14:15:41,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-07 14:15:41,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-07 14:15:41,322 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-07 14:15:41,323 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-07 14:15:41,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:15:41" (1/1) ... [2019-01-07 14:15:41,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:15:41" (1/1) ... [2019-01-07 14:15:41,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-07 14:15:41,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-07 14:15:41,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-07 14:15:41,385 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-07 14:15:41,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:15:41" (1/1) ... [2019-01-07 14:15:41,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:15:41" (1/1) ... [2019-01-07 14:15:41,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:15:41" (1/1) ... [2019-01-07 14:15:41,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:15:41" (1/1) ... [2019-01-07 14:15:41,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:15:41" (1/1) ... [2019-01-07 14:15:41,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:15:41" (1/1) ... [2019-01-07 14:15:41,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:15:41" (1/1) ... [2019-01-07 14:15:41,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-07 14:15:41,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-07 14:15:41,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-07 14:15:41,411 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-07 14:15:41,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:15:41" (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 [2019-01-07 14:15:41,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-07 14:15:41,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-07 14:15:41,879 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-07 14:15:41,879 INFO L286 CfgBuilder]: Removed 7 assue(true) statements. [2019-01-07 14:15:41,881 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 02:15:41 BoogieIcfgContainer [2019-01-07 14:15:41,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-07 14:15:41,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-07 14:15:41,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-07 14:15:41,885 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-07 14:15:41,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:15:41" (1/2) ... [2019-01-07 14:15:41,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc4b699 and model type speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 02:15:41, skipping insertion in model container [2019-01-07 14:15:41,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 02:15:41" (2/2) ... [2019-01-07 14:15:41,889 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-2-unlimited.bpl [2019-01-07 14:15:41,899 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-07 14:15:41,907 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-01-07 14:15:41,926 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-01-07 14:15:41,960 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-07 14:15:41,961 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-07 14:15:41,961 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-07 14:15:41,961 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-07 14:15:41,961 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-07 14:15:41,962 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-07 14:15:41,962 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-07 14:15:41,962 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-07 14:15:41,983 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-01-07 14:15:41,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-07 14:15:41,999 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 14:15:42,000 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-07 14:15:42,003 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-07 14:15:42,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 14:15:42,012 INFO L82 PathProgramCache]: Analyzing trace with hash 972, now seen corresponding path program 1 times [2019-01-07 14:15:42,015 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 14:15:42,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:15:42,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 14:15:42,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:15:42,065 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 14:15:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:15:42,338 INFO L273 TraceCheckUtils]: 0: Hoare triple {10#true} havoc main_p1, main_p2;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {12#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} is VALID [2019-01-07 14:15:42,343 INFO L273 TraceCheckUtils]: 1: Hoare triple {12#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} assume !(#memory_int[main_p1] >= 0); {11#false} is VALID [2019-01-07 14:15:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:15:42,348 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-07 14:15:42,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-07 14:15:42,349 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-07 14:15:42,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-07 14:15:42,357 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-07 14:15:42,361 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2019-01-07 14:15:42,393 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 2 edges. 2 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-07 14:15:42,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-07 14:15:42,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-07 14:15:42,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-07 14:15:42,405 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2019-01-07 14:15:42,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:42,558 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2019-01-07 14:15:42,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-07 14:15:42,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-07 14:15:42,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 14:15:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-01-07 14:15:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 15 transitions. [2019-01-07 14:15:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-01-07 14:15:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 15 transitions. [2019-01-07 14:15:42,565 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 15 transitions. [2019-01-07 14:15:42,626 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 15 edges. 15 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-07 14:15:42,637 INFO L225 Difference]: With dead ends: 13 [2019-01-07 14:15:42,638 INFO L226 Difference]: Without dead ends: 8 [2019-01-07 14:15:42,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-07 14:15:42,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-01-07 14:15:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 6. [2019-01-07 14:15:42,712 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-07 14:15:42,713 INFO L82 GeneralOperation]: Start isEquivalent. First operand 8 states. Second operand 6 states. [2019-01-07 14:15:42,714 INFO L74 IsIncluded]: Start isIncluded. First operand 8 states. Second operand 6 states. [2019-01-07 14:15:42,714 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 6 states. [2019-01-07 14:15:42,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:42,717 INFO L93 Difference]: Finished difference Result 8 states and 10 transitions. [2019-01-07 14:15:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2019-01-07 14:15:42,717 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 14:15:42,718 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-07 14:15:42,718 INFO L74 IsIncluded]: Start isIncluded. First operand 6 states. Second operand 8 states. [2019-01-07 14:15:42,718 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 8 states. [2019-01-07 14:15:42,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:42,721 INFO L93 Difference]: Finished difference Result 8 states and 10 transitions. [2019-01-07 14:15:42,721 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2019-01-07 14:15:42,721 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 14:15:42,721 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-07 14:15:42,722 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-07 14:15:42,722 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-07 14:15:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-07 14:15:42,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9 transitions. [2019-01-07 14:15:42,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 9 transitions. Word has length 2 [2019-01-07 14:15:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 14:15:42,726 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 9 transitions. [2019-01-07 14:15:42,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-07 14:15:42,726 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 9 transitions. [2019-01-07 14:15:42,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-07 14:15:42,727 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 14:15:42,727 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-07 14:15:42,728 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-07 14:15:42,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 14:15:42,728 INFO L82 PathProgramCache]: Analyzing trace with hash 29988, now seen corresponding path program 1 times [2019-01-07 14:15:42,728 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 14:15:42,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:15:42,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 14:15:42,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:15:42,730 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 14:15:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:15:43,162 INFO L273 TraceCheckUtils]: 0: Hoare triple {54#true} havoc main_p1, main_p2;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {56#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} is VALID [2019-01-07 14:15:43,171 INFO L273 TraceCheckUtils]: 1: Hoare triple {56#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {57#(<= 0 (select |#memory_int| ULTIMATE.start_main_p1))} is VALID [2019-01-07 14:15:43,173 INFO L273 TraceCheckUtils]: 2: Hoare triple {57#(<= 0 (select |#memory_int| ULTIMATE.start_main_p1))} assume !(#memory_int[main_p1] >= 0); {55#false} is VALID [2019-01-07 14:15:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:15:43,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 14:15:43,174 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 14:15:43,175 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-07 14:15:43,177 INFO L207 CegarAbsIntRunner]: [0], [6], [11] [2019-01-07 14:15:43,215 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 14:15:43,215 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 14:15:43,307 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 14:15:43,308 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 24 root evaluator evaluations with a maximum evaluation depth of 2. Performed 24 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-07 14:15:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 14:15:43,315 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 14:15:43,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 14:15:43,315 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-07 14:15:43,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 14:15:43,326 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 14:15:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:15:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:15:43,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 14:15:43,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-07 14:15:43,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2019-01-07 14:15:43,621 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-07 14:15:43,671 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 14:15:43,740 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-07 14:15:43,741 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-01-07 14:15:43,754 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-07 14:15:43,755 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_12|, ULTIMATE.start_main_p2]. (= (store (store |v_#memory_int_12| ULTIMATE.start_main_p1 0) ULTIMATE.start_main_p2 0) |#memory_int|) [2019-01-07 14:15:43,755 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ [ULTIMATE.start_main_p2]. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (= 0 (select |#memory_int| ULTIMATE.start_main_p2))) [2019-01-07 14:15:43,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 14:15:43,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2019-01-07 14:15:43,966 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 14:15:43,974 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 14:15:43,974 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:5 [2019-01-07 14:15:43,985 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-07 14:15:43,986 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_13|]. (let ((.cse0 (select |v_#memory_int_13| ULTIMATE.start_main_p1))) (and (= |#memory_int| (store |v_#memory_int_13| ULTIMATE.start_main_p1 (+ .cse0 1))) (= 0 .cse0))) [2019-01-07 14:15:43,986 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ []. (= (select |#memory_int| ULTIMATE.start_main_p1) 1) [2019-01-07 14:15:44,003 INFO L273 TraceCheckUtils]: 0: Hoare triple {54#true} havoc main_p1, main_p2;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {56#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} is VALID [2019-01-07 14:15:44,006 INFO L273 TraceCheckUtils]: 1: Hoare triple {56#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {64#(= (select |#memory_int| ULTIMATE.start_main_p1) 1)} is VALID [2019-01-07 14:15:44,008 INFO L273 TraceCheckUtils]: 2: Hoare triple {64#(= (select |#memory_int| ULTIMATE.start_main_p1) 1)} assume !(#memory_int[main_p1] >= 0); {55#false} is VALID [2019-01-07 14:15:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:15:44,010 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 14:15:44,081 INFO L273 TraceCheckUtils]: 2: Hoare triple {57#(<= 0 (select |#memory_int| ULTIMATE.start_main_p1))} assume !(#memory_int[main_p1] >= 0); {55#false} is VALID [2019-01-07 14:15:44,083 INFO L273 TraceCheckUtils]: 1: Hoare triple {71#(<= 0 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1))} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {57#(<= 0 (select |#memory_int| ULTIMATE.start_main_p1))} is VALID [2019-01-07 14:15:44,084 INFO L273 TraceCheckUtils]: 0: Hoare triple {54#true} havoc main_p1, main_p2;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {71#(<= 0 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1))} is VALID [2019-01-07 14:15:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:15:44,105 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-07 14:15:44,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 4 [2019-01-07 14:15:44,106 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-07 14:15:44,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-07 14:15:44,107 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-07 14:15:44,107 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states. [2019-01-07 14:15:44,144 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 3 edges. 3 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-07 14:15:44,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-07 14:15:44,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-07 14:15:44,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-01-07 14:15:44,146 INFO L87 Difference]: Start difference. First operand 6 states and 9 transitions. Second operand 4 states. [2019-01-07 14:15:44,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:44,369 INFO L93 Difference]: Finished difference Result 10 states and 17 transitions. [2019-01-07 14:15:44,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-07 14:15:44,370 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-07 14:15:44,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 14:15:44,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-01-07 14:15:44,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 14 transitions. [2019-01-07 14:15:44,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-01-07 14:15:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 14 transitions. [2019-01-07 14:15:44,374 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states and 14 transitions. [2019-01-07 14:15:44,452 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 14 edges. 14 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-07 14:15:44,454 INFO L225 Difference]: With dead ends: 10 [2019-01-07 14:15:44,454 INFO L226 Difference]: Without dead ends: 9 [2019-01-07 14:15:44,456 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-01-07 14:15:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-01-07 14:15:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 7. [2019-01-07 14:15:44,488 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-07 14:15:44,489 INFO L82 GeneralOperation]: Start isEquivalent. First operand 9 states. Second operand 7 states. [2019-01-07 14:15:44,489 INFO L74 IsIncluded]: Start isIncluded. First operand 9 states. Second operand 7 states. [2019-01-07 14:15:44,489 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 7 states. [2019-01-07 14:15:44,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:44,491 INFO L93 Difference]: Finished difference Result 9 states and 16 transitions. [2019-01-07 14:15:44,492 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 16 transitions. [2019-01-07 14:15:44,492 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 14:15:44,492 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-07 14:15:44,492 INFO L74 IsIncluded]: Start isIncluded. First operand 7 states. Second operand 9 states. [2019-01-07 14:15:44,493 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 9 states. [2019-01-07 14:15:44,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:44,495 INFO L93 Difference]: Finished difference Result 9 states and 16 transitions. [2019-01-07 14:15:44,495 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 16 transitions. [2019-01-07 14:15:44,495 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 14:15:44,496 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-07 14:15:44,496 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-07 14:15:44,496 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-07 14:15:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-01-07 14:15:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 13 transitions. [2019-01-07 14:15:44,498 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 13 transitions. Word has length 3 [2019-01-07 14:15:44,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 14:15:44,498 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 13 transitions. [2019-01-07 14:15:44,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-07 14:15:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 13 transitions. [2019-01-07 14:15:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-07 14:15:44,499 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 14:15:44,499 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-07 14:15:44,500 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-07 14:15:44,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 14:15:44,500 INFO L82 PathProgramCache]: Analyzing trace with hash 30050, now seen corresponding path program 1 times [2019-01-07 14:15:44,500 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 14:15:44,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:15:44,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 14:15:44,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:15:44,502 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 14:15:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:15:44,661 INFO L273 TraceCheckUtils]: 0: Hoare triple {116#true} havoc main_p1, main_p2;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {118#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= 0 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1)))} is VALID [2019-01-07 14:15:44,662 INFO L273 TraceCheckUtils]: 1: Hoare triple {118#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= 0 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1)))} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {119#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} is VALID [2019-01-07 14:15:44,675 INFO L273 TraceCheckUtils]: 2: Hoare triple {119#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} assume !(#memory_int[main_p1] >= 0); {117#false} is VALID [2019-01-07 14:15:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:15:44,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 14:15:44,676 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 14:15:44,676 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-07 14:15:44,676 INFO L207 CegarAbsIntRunner]: [0], [8], [11] [2019-01-07 14:15:44,677 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 14:15:44,677 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 14:15:44,768 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 14:15:44,768 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 24 root evaluator evaluations with a maximum evaluation depth of 2. Performed 24 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-07 14:15:44,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 14:15:44,769 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 14:15:44,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 14:15:44,769 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-07 14:15:44,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 14:15:44,781 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 14:15:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:15:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:15:44,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 14:15:44,843 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-07 14:15:44,862 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 15 [2019-01-07 14:15:44,865 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-07 14:15:44,967 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 14:15:45,137 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2019-01-07 14:15:45,159 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-07 14:15:45,240 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 14:15:45,240 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-01-07 14:15:45,243 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-07 14:15:45,243 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_15|, |v_#valid_4|]. (and (= (select (store |v_#valid_4| ULTIMATE.start_main_p1 1) ULTIMATE.start_main_p2) 0) (= |#memory_int| (store (store |v_#memory_int_15| ULTIMATE.start_main_p1 0) ULTIMATE.start_main_p2 0))) [2019-01-07 14:15:45,243 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ []. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2))) [2019-01-07 14:15:45,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 14:15:45,343 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2019-01-07 14:15:45,356 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 14:15:45,386 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-07 14:15:45,387 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:11 [2019-01-07 14:15:47,490 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-07 14:15:47,490 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_16|, ULTIMATE.start_main_p2]. (let ((.cse0 (select |v_#memory_int_16| ULTIMATE.start_main_p2))) (and (= (store |v_#memory_int_16| ULTIMATE.start_main_p2 (+ .cse0 (- 1))) |#memory_int|) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |v_#memory_int_16| ULTIMATE.start_main_p1)) (= .cse0 0))) [2019-01-07 14:15:47,491 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ [ULTIMATE.start_main_p2]. (and (= (- 1) (select |#memory_int| ULTIMATE.start_main_p2)) (= (select |#memory_int| ULTIMATE.start_main_p1) 0)) [2019-01-07 14:15:47,535 INFO L273 TraceCheckUtils]: 0: Hoare triple {116#true} havoc main_p1, main_p2;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {123#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2)))} is VALID [2019-01-07 14:15:47,537 INFO L273 TraceCheckUtils]: 1: Hoare triple {123#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2)))} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {127#(and (exists ((ULTIMATE.start_main_p2 Int)) (= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1))) (= (select |#memory_int| ULTIMATE.start_main_p1) 0))} is VALID [2019-01-07 14:15:47,538 INFO L273 TraceCheckUtils]: 2: Hoare triple {127#(and (exists ((ULTIMATE.start_main_p2 Int)) (= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1))) (= (select |#memory_int| ULTIMATE.start_main_p1) 0))} assume !(#memory_int[main_p1] >= 0); {117#false} is VALID [2019-01-07 14:15:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:15:47,539 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 14:15:47,586 INFO L273 TraceCheckUtils]: 2: Hoare triple {131#(<= 0 (select |#memory_int| ULTIMATE.start_main_p1))} assume !(#memory_int[main_p1] >= 0); {117#false} is VALID [2019-01-07 14:15:47,587 INFO L273 TraceCheckUtils]: 1: Hoare triple {135#(<= 0 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1))} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {131#(<= 0 (select |#memory_int| ULTIMATE.start_main_p1))} is VALID [2019-01-07 14:15:47,591 INFO L273 TraceCheckUtils]: 0: Hoare triple {116#true} havoc main_p1, main_p2;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {135#(<= 0 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1))} is VALID [2019-01-07 14:15:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:15:47,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 14:15:47,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 14:15:47,611 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 14:15:47,611 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-07 14:15:47,612 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-07 14:15:47,612 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states. [2019-01-07 14:15:47,640 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 6 edges. 6 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-07 14:15:47,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 14:15:47,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 14:15:47,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 14:15:47,641 INFO L87 Difference]: Start difference. First operand 7 states and 13 transitions. Second operand 6 states. [2019-01-07 14:15:48,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:48,026 INFO L93 Difference]: Finished difference Result 17 states and 27 transitions. [2019-01-07 14:15:48,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 14:15:48,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-07 14:15:48,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 14:15:48,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-07 14:15:48,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-01-07 14:15:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-07 14:15:48,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-01-07 14:15:48,029 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 20 transitions. [2019-01-07 14:15:48,069 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 20 edges. 20 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-07 14:15:48,071 INFO L225 Difference]: With dead ends: 17 [2019-01-07 14:15:48,072 INFO L226 Difference]: Without dead ends: 14 [2019-01-07 14:15:48,072 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-07 14:15:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-01-07 14:15:48,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2019-01-07 14:15:48,091 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-07 14:15:48,091 INFO L82 GeneralOperation]: Start isEquivalent. First operand 14 states. Second operand 10 states. [2019-01-07 14:15:48,091 INFO L74 IsIncluded]: Start isIncluded. First operand 14 states. Second operand 10 states. [2019-01-07 14:15:48,092 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 10 states. [2019-01-07 14:15:48,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:48,094 INFO L93 Difference]: Finished difference Result 14 states and 23 transitions. [2019-01-07 14:15:48,094 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 23 transitions. [2019-01-07 14:15:48,094 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 14:15:48,094 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-07 14:15:48,095 INFO L74 IsIncluded]: Start isIncluded. First operand 10 states. Second operand 14 states. [2019-01-07 14:15:48,095 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 14 states. [2019-01-07 14:15:48,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:48,097 INFO L93 Difference]: Finished difference Result 14 states and 23 transitions. [2019-01-07 14:15:48,097 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 23 transitions. [2019-01-07 14:15:48,097 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 14:15:48,097 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-07 14:15:48,097 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-07 14:15:48,098 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-07 14:15:48,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-01-07 14:15:48,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 21 transitions. [2019-01-07 14:15:48,099 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 21 transitions. Word has length 3 [2019-01-07 14:15:48,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 14:15:48,100 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 21 transitions. [2019-01-07 14:15:48,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 14:15:48,100 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 21 transitions. [2019-01-07 14:15:48,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 14:15:48,100 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 14:15:48,100 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 14:15:48,101 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-07 14:15:48,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 14:15:48,101 INFO L82 PathProgramCache]: Analyzing trace with hash 929546, now seen corresponding path program 1 times [2019-01-07 14:15:48,101 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 14:15:48,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:15:48,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 14:15:48,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:15:48,103 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 14:15:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:15:48,239 INFO L273 TraceCheckUtils]: 0: Hoare triple {207#true} havoc main_p1, main_p2;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {209#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= (select |#memory_int| ULTIMATE.start_main_p1) 0))} is VALID [2019-01-07 14:15:48,241 INFO L273 TraceCheckUtils]: 1: Hoare triple {209#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= (select |#memory_int| ULTIMATE.start_main_p1) 0))} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {210#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (<= 1 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1)))} is VALID [2019-01-07 14:15:48,243 INFO L273 TraceCheckUtils]: 2: Hoare triple {210#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (<= 1 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1)))} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {211#(<= 1 (select |#memory_int| ULTIMATE.start_main_p1))} is VALID [2019-01-07 14:15:48,244 INFO L273 TraceCheckUtils]: 3: Hoare triple {211#(<= 1 (select |#memory_int| ULTIMATE.start_main_p1))} assume !(#memory_int[main_p1] >= 0); {208#false} is VALID [2019-01-07 14:15:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:15:48,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 14:15:48,245 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 14:15:48,245 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 14:15:48,246 INFO L207 CegarAbsIntRunner]: [0], [6], [8], [11] [2019-01-07 14:15:48,248 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 14:15:48,248 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 14:15:48,264 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 14:15:48,265 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 26 root evaluator evaluations with a maximum evaluation depth of 2. Performed 26 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 14:15:48,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 14:15:48,265 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 14:15:48,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 14:15:48,265 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-07 14:15:48,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 14:15:48,275 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 14:15:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:15:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:15:48,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 14:15:48,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2019-01-07 14:15:48,370 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 14:15:48,380 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-07 14:15:48,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 15 [2019-01-07 14:15:48,391 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-07 14:15:48,426 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 14:15:48,449 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 14:15:48,449 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-01-07 14:15:48,452 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-07 14:15:48,452 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_18|, |v_#valid_5|]. (and (= (select (store |v_#valid_5| ULTIMATE.start_main_p1 1) ULTIMATE.start_main_p2) 0) (= (store (store |v_#memory_int_18| ULTIMATE.start_main_p1 0) ULTIMATE.start_main_p2 0) |#memory_int|)) [2019-01-07 14:15:48,452 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ []. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2))) [2019-01-07 14:15:48,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 14:15:48,547 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2019-01-07 14:15:48,551 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 14:15:48,560 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 14:15:48,561 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2019-01-07 14:15:48,571 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-07 14:15:48,572 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_19|]. (let ((.cse0 (select |v_#memory_int_19| ULTIMATE.start_main_p1))) (and (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= (store |v_#memory_int_19| ULTIMATE.start_main_p1 (+ .cse0 1)) |#memory_int|) (= 0 (select |v_#memory_int_19| ULTIMATE.start_main_p2)) (= .cse0 0))) [2019-01-07 14:15:48,572 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ []. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 1) (= 0 (select |#memory_int| ULTIMATE.start_main_p2))) [2019-01-07 14:15:48,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 14:15:48,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 14:15:48,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 14:15:48,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 14:15:48,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2019-01-07 14:15:48,616 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 14:15:48,628 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-07 14:15:48,628 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:11 [2019-01-07 14:15:50,646 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-07 14:15:50,646 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_20|, ULTIMATE.start_main_p2]. (let ((.cse0 (select |v_#memory_int_20| ULTIMATE.start_main_p2))) (and (= .cse0 0) (= (store |v_#memory_int_20| ULTIMATE.start_main_p2 (+ .cse0 (- 1))) |#memory_int|) (= 1 (select |v_#memory_int_20| ULTIMATE.start_main_p1)))) [2019-01-07 14:15:50,646 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ [ULTIMATE.start_main_p2]. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 1) (= (- 1) (select |#memory_int| ULTIMATE.start_main_p2))) [2019-01-07 14:15:50,685 INFO L273 TraceCheckUtils]: 0: Hoare triple {207#true} havoc main_p1, main_p2;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {215#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2)))} is VALID [2019-01-07 14:15:50,686 INFO L273 TraceCheckUtils]: 1: Hoare triple {215#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2)))} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {219#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 1) (= 0 (select |#memory_int| ULTIMATE.start_main_p2)))} is VALID [2019-01-07 14:15:50,687 INFO L273 TraceCheckUtils]: 2: Hoare triple {219#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 1) (= 0 (select |#memory_int| ULTIMATE.start_main_p2)))} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {223#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 1) (exists ((ULTIMATE.start_main_p2 Int)) (= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1))))} is VALID [2019-01-07 14:15:50,688 INFO L273 TraceCheckUtils]: 3: Hoare triple {223#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 1) (exists ((ULTIMATE.start_main_p2 Int)) (= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1))))} assume !(#memory_int[main_p1] >= 0); {208#false} is VALID [2019-01-07 14:15:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:15:50,689 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 14:15:50,742 INFO L273 TraceCheckUtils]: 3: Hoare triple {227#(<= 0 (select |#memory_int| ULTIMATE.start_main_p1))} assume !(#memory_int[main_p1] >= 0); {208#false} is VALID [2019-01-07 14:15:50,744 INFO L273 TraceCheckUtils]: 2: Hoare triple {231#(<= 0 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1))} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {227#(<= 0 (select |#memory_int| ULTIMATE.start_main_p1))} is VALID [2019-01-07 14:15:50,745 INFO L273 TraceCheckUtils]: 1: Hoare triple {235#(<= 0 (select (store (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2 (+ (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1))} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {231#(<= 0 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1))} is VALID [2019-01-07 14:15:50,747 INFO L273 TraceCheckUtils]: 0: Hoare triple {207#true} havoc main_p1, main_p2;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {235#(<= 0 (select (store (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2 (+ (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1))} is VALID [2019-01-07 14:15:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:15:50,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 14:15:50,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 14:15:50,768 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 14:15:50,769 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 14:15:50,769 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-07 14:15:50,769 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 8 states. [2019-01-07 14:15:50,781 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 8 edges. 8 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-07 14:15:50,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 14:15:50,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 14:15:50,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-07 14:15:50,782 INFO L87 Difference]: Start difference. First operand 10 states and 21 transitions. Second operand 8 states. [2019-01-07 14:15:51,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:51,071 INFO L93 Difference]: Finished difference Result 18 states and 31 transitions. [2019-01-07 14:15:51,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-07 14:15:51,071 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 14:15:51,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 14:15:51,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-07 14:15:51,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2019-01-07 14:15:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-07 14:15:51,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2019-01-07 14:15:51,074 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states and 21 transitions. [2019-01-07 14:15:51,110 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 21 edges. 21 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-07 14:15:51,112 INFO L225 Difference]: With dead ends: 18 [2019-01-07 14:15:51,112 INFO L226 Difference]: Without dead ends: 15 [2019-01-07 14:15:51,112 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-07 14:15:51,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-01-07 14:15:51,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 6. [2019-01-07 14:15:51,148 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-07 14:15:51,149 INFO L82 GeneralOperation]: Start isEquivalent. First operand 15 states. Second operand 6 states. [2019-01-07 14:15:51,149 INFO L74 IsIncluded]: Start isIncluded. First operand 15 states. Second operand 6 states. [2019-01-07 14:15:51,149 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 6 states. [2019-01-07 14:15:51,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:51,151 INFO L93 Difference]: Finished difference Result 15 states and 26 transitions. [2019-01-07 14:15:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 26 transitions. [2019-01-07 14:15:51,152 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 14:15:51,152 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-07 14:15:51,152 INFO L74 IsIncluded]: Start isIncluded. First operand 6 states. Second operand 15 states. [2019-01-07 14:15:51,152 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 15 states. [2019-01-07 14:15:51,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:51,154 INFO L93 Difference]: Finished difference Result 15 states and 26 transitions. [2019-01-07 14:15:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 26 transitions. [2019-01-07 14:15:51,155 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 14:15:51,155 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-07 14:15:51,155 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-07 14:15:51,155 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-07 14:15:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-07 14:15:51,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9 transitions. [2019-01-07 14:15:51,156 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 9 transitions. Word has length 4 [2019-01-07 14:15:51,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 14:15:51,157 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 9 transitions. [2019-01-07 14:15:51,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 14:15:51,157 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 9 transitions. [2019-01-07 14:15:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 14:15:51,157 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 14:15:51,157 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 14:15:51,158 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-07 14:15:51,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 14:15:51,158 INFO L82 PathProgramCache]: Analyzing trace with hash 931594, now seen corresponding path program 1 times [2019-01-07 14:15:51,158 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 14:15:51,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:15:51,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 14:15:51,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:15:51,160 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 14:15:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:15:51,216 INFO L273 TraceCheckUtils]: 0: Hoare triple {305#true} havoc main_p1, main_p2;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {307#(= (select |#memory_int| ULTIMATE.start_main_p2) 0)} is VALID [2019-01-07 14:15:51,217 INFO L273 TraceCheckUtils]: 1: Hoare triple {307#(= (select |#memory_int| ULTIMATE.start_main_p2) 0)} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {308#(<= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)} is VALID [2019-01-07 14:15:51,218 INFO L273 TraceCheckUtils]: 2: Hoare triple {308#(<= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)} assume #memory_int[main_p1] >= 0; {308#(<= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)} is VALID [2019-01-07 14:15:51,218 INFO L273 TraceCheckUtils]: 3: Hoare triple {308#(<= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)} assume !(#memory_int[main_p2] <= 0); {306#false} is VALID [2019-01-07 14:15:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:15:51,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 14:15:51,219 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 14:15:51,220 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 14:15:51,220 INFO L207 CegarAbsIntRunner]: [0], [8], [12], [13] [2019-01-07 14:15:51,224 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 14:15:51,224 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 14:15:51,247 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 14:15:51,247 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 26 root evaluator evaluations with a maximum evaluation depth of 2. Performed 26 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-07 14:15:51,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 14:15:51,248 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 14:15:51,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 14:15:51,248 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-07 14:15:51,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 14:15:51,257 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 14:15:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:15:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:15:51,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 14:15:51,290 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-07 14:15:51,301 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2019-01-07 14:15:51,304 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-07 14:15:51,314 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 14:15:51,330 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-07 14:15:51,331 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-01-07 14:15:51,333 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-07 14:15:51,333 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_23|, ULTIMATE.start_main_p1]. (= (store (store |v_#memory_int_23| ULTIMATE.start_main_p1 0) ULTIMATE.start_main_p2 0) |#memory_int|) [2019-01-07 14:15:51,333 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ [ULTIMATE.start_main_p1]. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (= 0 (select |#memory_int| ULTIMATE.start_main_p2))) [2019-01-07 14:15:51,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 14:15:51,361 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2019-01-07 14:15:51,363 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 14:15:51,365 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 14:15:51,365 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:5 [2019-01-07 14:15:51,378 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-07 14:15:51,378 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_24|]. (let ((.cse0 (select |v_#memory_int_24| ULTIMATE.start_main_p2))) (and (= 0 .cse0) (= |#memory_int| (store |v_#memory_int_24| ULTIMATE.start_main_p2 (+ .cse0 (- 1)))))) [2019-01-07 14:15:51,378 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ []. (= (- 1) (select |#memory_int| ULTIMATE.start_main_p2)) [2019-01-07 14:15:51,388 INFO L273 TraceCheckUtils]: 0: Hoare triple {305#true} havoc main_p1, main_p2;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {307#(= (select |#memory_int| ULTIMATE.start_main_p2) 0)} is VALID [2019-01-07 14:15:51,389 INFO L273 TraceCheckUtils]: 1: Hoare triple {307#(= (select |#memory_int| ULTIMATE.start_main_p2) 0)} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {315#(= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1))} is VALID [2019-01-07 14:15:51,390 INFO L273 TraceCheckUtils]: 2: Hoare triple {315#(= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1))} assume #memory_int[main_p1] >= 0; {315#(= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1))} is VALID [2019-01-07 14:15:51,391 INFO L273 TraceCheckUtils]: 3: Hoare triple {315#(= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1))} assume !(#memory_int[main_p2] <= 0); {306#false} is VALID [2019-01-07 14:15:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:15:51,392 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 14:15:51,421 INFO L273 TraceCheckUtils]: 3: Hoare triple {322#(<= (select |#memory_int| ULTIMATE.start_main_p2) 0)} assume !(#memory_int[main_p2] <= 0); {306#false} is VALID [2019-01-07 14:15:51,422 INFO L273 TraceCheckUtils]: 2: Hoare triple {322#(<= (select |#memory_int| ULTIMATE.start_main_p2) 0)} assume #memory_int[main_p1] >= 0; {322#(<= (select |#memory_int| ULTIMATE.start_main_p2) 0)} is VALID [2019-01-07 14:15:51,423 INFO L273 TraceCheckUtils]: 1: Hoare triple {329#(<= (select |#memory_int| ULTIMATE.start_main_p2) 1)} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {322#(<= (select |#memory_int| ULTIMATE.start_main_p2) 0)} is VALID [2019-01-07 14:15:51,424 INFO L273 TraceCheckUtils]: 0: Hoare triple {305#true} havoc main_p1, main_p2;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {329#(<= (select |#memory_int| ULTIMATE.start_main_p2) 1)} is VALID [2019-01-07 14:15:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:15:51,445 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-07 14:15:51,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-07 14:15:51,446 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-07 14:15:51,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-07 14:15:51,446 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-07 14:15:51,446 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states. [2019-01-07 14:15:51,450 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 4 edges. 4 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-07 14:15:51,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-07 14:15:51,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-07 14:15:51,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-07 14:15:51,452 INFO L87 Difference]: Start difference. First operand 6 states and 9 transitions. Second operand 4 states. [2019-01-07 14:15:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:51,557 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2019-01-07 14:15:51,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-07 14:15:51,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-07 14:15:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 14:15:51,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-01-07 14:15:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2019-01-07 14:15:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-01-07 14:15:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2019-01-07 14:15:51,561 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states and 13 transitions. [2019-01-07 14:15:51,579 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 13 edges. 13 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-07 14:15:51,581 INFO L225 Difference]: With dead ends: 12 [2019-01-07 14:15:51,581 INFO L226 Difference]: Without dead ends: 10 [2019-01-07 14:15:51,582 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-07 14:15:51,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-01-07 14:15:51,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2019-01-07 14:15:51,627 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-07 14:15:51,627 INFO L82 GeneralOperation]: Start isEquivalent. First operand 10 states. Second operand 8 states. [2019-01-07 14:15:51,628 INFO L74 IsIncluded]: Start isIncluded. First operand 10 states. Second operand 8 states. [2019-01-07 14:15:51,628 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 8 states. [2019-01-07 14:15:51,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:51,630 INFO L93 Difference]: Finished difference Result 10 states and 15 transitions. [2019-01-07 14:15:51,630 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 15 transitions. [2019-01-07 14:15:51,630 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 14:15:51,630 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-07 14:15:51,630 INFO L74 IsIncluded]: Start isIncluded. First operand 8 states. Second operand 10 states. [2019-01-07 14:15:51,631 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 10 states. [2019-01-07 14:15:51,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:51,632 INFO L93 Difference]: Finished difference Result 10 states and 15 transitions. [2019-01-07 14:15:51,632 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 15 transitions. [2019-01-07 14:15:51,632 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 14:15:51,632 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-07 14:15:51,633 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-07 14:15:51,633 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-07 14:15:51,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-07 14:15:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 14 transitions. [2019-01-07 14:15:51,634 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 14 transitions. Word has length 4 [2019-01-07 14:15:51,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 14:15:51,634 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 14 transitions. [2019-01-07 14:15:51,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-07 14:15:51,634 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 14 transitions. [2019-01-07 14:15:51,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-07 14:15:51,635 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 14:15:51,635 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-01-07 14:15:51,635 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-07 14:15:51,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 14:15:51,636 INFO L82 PathProgramCache]: Analyzing trace with hash 28814048, now seen corresponding path program 1 times [2019-01-07 14:15:51,636 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 14:15:51,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:15:51,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 14:15:51,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:15:51,637 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 14:15:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:15:51,733 INFO L273 TraceCheckUtils]: 0: Hoare triple {382#true} havoc main_p1, main_p2;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {384#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= 0 (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2)))} is VALID [2019-01-07 14:15:51,734 INFO L273 TraceCheckUtils]: 1: Hoare triple {384#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= 0 (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2)))} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {384#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= 0 (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2)))} is VALID [2019-01-07 14:15:51,735 INFO L273 TraceCheckUtils]: 2: Hoare triple {384#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= 0 (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2)))} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {384#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= 0 (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2)))} is VALID [2019-01-07 14:15:51,736 INFO L273 TraceCheckUtils]: 3: Hoare triple {384#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= 0 (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2)))} assume #memory_int[main_p1] >= 0; {385#(= (select |#memory_int| ULTIMATE.start_main_p2) 0)} is VALID [2019-01-07 14:15:51,737 INFO L273 TraceCheckUtils]: 4: Hoare triple {385#(= (select |#memory_int| ULTIMATE.start_main_p2) 0)} assume !(#memory_int[main_p2] <= 0); {383#false} is VALID [2019-01-07 14:15:51,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-01-07 14:15:51,739 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-07 14:15:51,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-07 14:15:51,739 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-07 14:15:51,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-01-07 14:15:51,740 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-07 14:15:51,740 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states. [2019-01-07 14:15:51,749 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 4 edges. 4 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-07 14:15:51,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-07 14:15:51,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-07 14:15:51,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-01-07 14:15:51,750 INFO L87 Difference]: Start difference. First operand 8 states and 14 transitions. Second operand 4 states. [2019-01-07 14:15:51,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:51,872 INFO L93 Difference]: Finished difference Result 11 states and 18 transitions. [2019-01-07 14:15:51,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-07 14:15:51,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-01-07 14:15:51,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 14:15:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-01-07 14:15:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2019-01-07 14:15:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-01-07 14:15:51,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2019-01-07 14:15:51,874 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 9 transitions. [2019-01-07 14:15:51,925 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 9 edges. 9 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-07 14:15:51,926 INFO L225 Difference]: With dead ends: 11 [2019-01-07 14:15:51,926 INFO L226 Difference]: Without dead ends: 9 [2019-01-07 14:15:51,927 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-01-07 14:15:51,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-01-07 14:15:51,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-01-07 14:15:51,978 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-07 14:15:51,978 INFO L82 GeneralOperation]: Start isEquivalent. First operand 9 states. Second operand 9 states. [2019-01-07 14:15:51,979 INFO L74 IsIncluded]: Start isIncluded. First operand 9 states. Second operand 9 states. [2019-01-07 14:15:51,979 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 9 states. [2019-01-07 14:15:51,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:51,980 INFO L93 Difference]: Finished difference Result 9 states and 16 transitions. [2019-01-07 14:15:51,980 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 16 transitions. [2019-01-07 14:15:51,980 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 14:15:51,981 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-07 14:15:51,981 INFO L74 IsIncluded]: Start isIncluded. First operand 9 states. Second operand 9 states. [2019-01-07 14:15:51,981 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 9 states. [2019-01-07 14:15:51,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:51,982 INFO L93 Difference]: Finished difference Result 9 states and 16 transitions. [2019-01-07 14:15:51,982 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 16 transitions. [2019-01-07 14:15:51,982 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 14:15:51,982 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-07 14:15:51,982 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-07 14:15:51,983 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-07 14:15:51,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-01-07 14:15:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 16 transitions. [2019-01-07 14:15:51,983 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 16 transitions. Word has length 5 [2019-01-07 14:15:51,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 14:15:51,984 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 16 transitions. [2019-01-07 14:15:51,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-07 14:15:51,984 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 16 transitions. [2019-01-07 14:15:51,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-07 14:15:51,984 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 14:15:51,984 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-07 14:15:51,985 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-07 14:15:51,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 14:15:51,985 INFO L82 PathProgramCache]: Analyzing trace with hash 28873630, now seen corresponding path program 1 times [2019-01-07 14:15:51,985 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 14:15:51,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:15:51,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 14:15:51,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:15:51,986 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 14:15:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:15:52,144 INFO L273 TraceCheckUtils]: 0: Hoare triple {438#true} havoc main_p1, main_p2;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {440#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= (select |#memory_int| ULTIMATE.start_main_p2) 0))} is VALID [2019-01-07 14:15:52,147 INFO L273 TraceCheckUtils]: 1: Hoare triple {440#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= (select |#memory_int| ULTIMATE.start_main_p2) 0))} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {441#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (<= (+ (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2) 1) 0))} is VALID [2019-01-07 14:15:52,148 INFO L273 TraceCheckUtils]: 2: Hoare triple {441#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (<= (+ (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2) 1) 0))} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {442#(<= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)} is VALID [2019-01-07 14:15:52,152 INFO L273 TraceCheckUtils]: 3: Hoare triple {442#(<= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)} assume #memory_int[main_p1] >= 0; {442#(<= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)} is VALID [2019-01-07 14:15:52,153 INFO L273 TraceCheckUtils]: 4: Hoare triple {442#(<= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)} assume !(#memory_int[main_p2] <= 0); {439#false} is VALID [2019-01-07 14:15:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:15:52,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 14:15:52,154 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 14:15:52,154 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-07 14:15:52,154 INFO L207 CegarAbsIntRunner]: [0], [6], [8], [12], [13] [2019-01-07 14:15:52,157 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 14:15:52,157 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 14:15:52,178 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 14:15:52,178 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 28 root evaluator evaluations with a maximum evaluation depth of 2. Performed 28 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 14:15:52,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 14:15:52,179 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 14:15:52,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 14:15:52,179 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-07 14:15:52,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 14:15:52,188 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 14:15:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:15:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:15:52,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 14:15:52,247 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2019-01-07 14:15:52,248 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 14:15:52,258 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-07 14:15:52,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 15 [2019-01-07 14:15:52,280 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-07 14:15:52,290 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 14:15:52,303 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 14:15:52,303 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-01-07 14:15:52,307 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-07 14:15:52,308 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_26|, |v_#valid_6|]. (and (= |#memory_int| (store (store |v_#memory_int_26| ULTIMATE.start_main_p1 0) ULTIMATE.start_main_p2 0)) (= 0 (select (store |v_#valid_6| ULTIMATE.start_main_p1 1) ULTIMATE.start_main_p2))) [2019-01-07 14:15:52,308 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ []. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2))) [2019-01-07 14:15:52,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 14:15:52,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2019-01-07 14:15:52,351 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 14:15:52,361 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 14:15:52,361 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2019-01-07 14:15:52,374 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-07 14:15:52,375 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_27|]. (let ((.cse0 (select |v_#memory_int_27| ULTIMATE.start_main_p2))) (and (= 0 .cse0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= (store |v_#memory_int_27| ULTIMATE.start_main_p2 (+ .cse0 (- 1))) |#memory_int|) (= (select |v_#memory_int_27| ULTIMATE.start_main_p1) 0))) [2019-01-07 14:15:52,375 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ []. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (= (- 1) (select |#memory_int| ULTIMATE.start_main_p2))) [2019-01-07 14:15:52,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 14:15:52,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 14:15:52,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 14:15:52,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 14:15:52,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 29 [2019-01-07 14:15:52,426 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 14:15:52,449 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-07 14:15:52,450 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:13 [2019-01-07 14:15:52,485 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-07 14:15:52,485 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_28|, ULTIMATE.start_main_p1]. (let ((.cse0 (select |v_#memory_int_28| ULTIMATE.start_main_p1))) (and (= (store |v_#memory_int_28| ULTIMATE.start_main_p1 (+ .cse0 1)) |#memory_int|) (= .cse0 0) (= 0 (+ (select |v_#memory_int_28| ULTIMATE.start_main_p2) 1)))) [2019-01-07 14:15:52,485 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ [ULTIMATE.start_main_p1]. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 1) (= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)) [2019-01-07 14:15:52,571 INFO L273 TraceCheckUtils]: 0: Hoare triple {438#true} havoc main_p1, main_p2;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {446#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2)))} is VALID [2019-01-07 14:15:52,580 INFO L273 TraceCheckUtils]: 1: Hoare triple {446#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2)))} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {450#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1)))} is VALID [2019-01-07 14:15:52,593 INFO L273 TraceCheckUtils]: 2: Hoare triple {450#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1)))} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {454#(and (exists ((ULTIMATE.start_main_p1 Int)) (= (select |#memory_int| ULTIMATE.start_main_p1) 1)) (= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0))} is VALID [2019-01-07 14:15:52,607 INFO L273 TraceCheckUtils]: 3: Hoare triple {454#(and (exists ((ULTIMATE.start_main_p1 Int)) (= (select |#memory_int| ULTIMATE.start_main_p1) 1)) (= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0))} assume #memory_int[main_p1] >= 0; {454#(and (exists ((ULTIMATE.start_main_p1 Int)) (= (select |#memory_int| ULTIMATE.start_main_p1) 1)) (= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0))} is VALID [2019-01-07 14:15:52,610 INFO L273 TraceCheckUtils]: 4: Hoare triple {454#(and (exists ((ULTIMATE.start_main_p1 Int)) (= (select |#memory_int| ULTIMATE.start_main_p1) 1)) (= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0))} assume !(#memory_int[main_p2] <= 0); {439#false} is VALID [2019-01-07 14:15:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:15:52,611 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 14:15:52,696 INFO L273 TraceCheckUtils]: 4: Hoare triple {461#(<= (select |#memory_int| ULTIMATE.start_main_p2) 0)} assume !(#memory_int[main_p2] <= 0); {439#false} is VALID [2019-01-07 14:15:52,697 INFO L273 TraceCheckUtils]: 3: Hoare triple {461#(<= (select |#memory_int| ULTIMATE.start_main_p2) 0)} assume #memory_int[main_p1] >= 0; {461#(<= (select |#memory_int| ULTIMATE.start_main_p2) 0)} is VALID [2019-01-07 14:15:52,699 INFO L273 TraceCheckUtils]: 2: Hoare triple {468#(<= (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2) 0)} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {461#(<= (select |#memory_int| ULTIMATE.start_main_p2) 0)} is VALID [2019-01-07 14:15:52,701 INFO L273 TraceCheckUtils]: 1: Hoare triple {472#(<= (select (store (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1 (+ (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2) 0)} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {468#(<= (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2) 0)} is VALID [2019-01-07 14:15:52,705 INFO L273 TraceCheckUtils]: 0: Hoare triple {438#true} havoc main_p1, main_p2;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {472#(<= (select (store (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1 (+ (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2) 0)} is VALID [2019-01-07 14:15:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:15:52,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 14:15:52,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 14:15:52,725 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 14:15:52,726 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-07 14:15:52,726 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-07 14:15:52,726 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 8 states. [2019-01-07 14:15:52,740 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 10 edges. 10 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-07 14:15:52,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 14:15:52,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 14:15:52,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-07 14:15:52,741 INFO L87 Difference]: Start difference. First operand 9 states and 16 transitions. Second operand 8 states. [2019-01-07 14:15:53,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:53,061 INFO L93 Difference]: Finished difference Result 12 states and 22 transitions. [2019-01-07 14:15:53,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-07 14:15:53,061 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-07 14:15:53,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 14:15:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-07 14:15:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-01-07 14:15:53,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-07 14:15:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-01-07 14:15:53,064 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states and 15 transitions. [2019-01-07 14:15:53,090 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 15 edges. 15 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-07 14:15:53,090 INFO L225 Difference]: With dead ends: 12 [2019-01-07 14:15:53,090 INFO L226 Difference]: Without dead ends: 0 [2019-01-07 14:15:53,091 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-07 14:15:53,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-01-07 14:15:53,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-01-07 14:15:53,091 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-07 14:15:53,092 INFO L82 GeneralOperation]: Start isEquivalent. First operand 0 states. Second operand 0 states. [2019-01-07 14:15:53,092 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2019-01-07 14:15:53,092 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2019-01-07 14:15:53,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:53,092 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-01-07 14:15:53,092 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-07 14:15:53,092 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 14:15:53,092 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-07 14:15:53,093 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2019-01-07 14:15:53,093 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2019-01-07 14:15:53,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:15:53,093 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-01-07 14:15:53,093 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-07 14:15:53,093 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 14:15:53,093 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-07 14:15:53,094 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-07 14:15:53,094 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-07 14:15:53,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-01-07 14:15:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-01-07 14:15:53,094 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2019-01-07 14:15:53,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 14:15:53,094 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-01-07 14:15:53,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 14:15:53,095 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-07 14:15:53,095 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 14:15:53,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-01-07 14:15:53,331 WARN L181 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2019-01-07 14:15:53,340 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 7 9) no Hoare annotation was computed. [2019-01-07 14:15:53,341 INFO L448 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2019-01-07 14:15:53,341 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 7 9) no Hoare annotation was computed. [2019-01-07 14:15:53,341 INFO L444 ceAbstractionStarter]: At program point L24-1(lines 23 29) the Hoare annotation is: (let ((.cse2 (select |#memory_int| ULTIMATE.start_main_p1))) (let ((.cse0 (let ((.cse3 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1))) (or (and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (<= 1 .cse3)) (and (= .cse2 0) (= 0 .cse3))))) (.cse1 (select (store |#memory_int| ULTIMATE.start_main_p1 (+ .cse2 1)) ULTIMATE.start_main_p2))) (or (and .cse0 (= 0 .cse1)) (and .cse0 (<= (+ .cse1 1) 0))))) [2019-01-07 14:15:53,342 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONASSERT(line 32) no Hoare annotation was computed. [2019-01-07 14:15:53,342 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 31) no Hoare annotation was computed. [2019-01-07 14:15:53,342 INFO L448 ceAbstractionStarter]: For program point L14(lines 7 34) no Hoare annotation was computed. [2019-01-07 14:15:53,344 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2019-01-07 14:15:53,344 WARN L170 areAnnotationChecker]: ULTIMATE.startErr0ASSERT_VIOLATIONASSERT has no Hoare annotation [2019-01-07 14:15:53,344 WARN L170 areAnnotationChecker]: L32 has no Hoare annotation [2019-01-07 14:15:53,348 WARN L170 areAnnotationChecker]: L32 has no Hoare annotation [2019-01-07 14:15:53,348 WARN L170 areAnnotationChecker]: L32 has no Hoare annotation [2019-01-07 14:15:53,349 WARN L170 areAnnotationChecker]: L14 has no Hoare annotation [2019-01-07 14:15:53,349 INFO L163 areAnnotationChecker]: CFG has 2 edges. 2 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2019-01-07 14:15:53,360 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.01 02:15:53 BoogieIcfgContainer [2019-01-07 14:15:53,360 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-07 14:15:53,361 INFO L168 Benchmark]: Toolchain (without parser) took 12040.93 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 664.8 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -277.5 MB). Peak memory consumption was 387.3 MB. Max. memory is 7.1 GB. [2019-01-07 14:15:53,363 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-07 14:15:53,363 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.64 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-07 14:15:53,364 INFO L168 Benchmark]: Boogie Preprocessor took 26.52 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-07 14:15:53,364 INFO L168 Benchmark]: RCFGBuilder took 470.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2019-01-07 14:15:53,365 INFO L168 Benchmark]: TraceAbstraction took 11477.85 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 664.8 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -298.6 MB). Peak memory consumption was 366.2 MB. Max. memory is 7.1 GB. [2019-01-07 14:15:53,368 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - GenericResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 61.64 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.52 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 470.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11477.85 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 664.8 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -298.6 MB). Peak memory consumption was 366.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 32]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 31]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((!(p1 == p2) && 1 <= #memory_int[p2 := #memory_int[p2] + -1][p1]) || (#memory_int[p1] == 0 && 0 == #memory_int[p2 := #memory_int[p2] + -1][p1])) && 0 == #memory_int[p1 := #memory_int[p1] + 1][p2]) || (((!(p1 == p2) && 1 <= #memory_int[p2 := #memory_int[p2] + -1][p1]) || (#memory_int[p1] == 0 && 0 == #memory_int[p2 := #memory_int[p2] + -1][p1])) && #memory_int[p1 := #memory_int[p1] + 1][p2] + 1 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 2 error locations. SAFE Result, 11.3s OverallTime, 7 OverallIterations, 2 TraceHistogramMax, 1.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 13 SDtfs, 32 SDslu, 1 SDs, 0 SdLazy, 155 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 5 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 8 NumberOfFragments, 101 HoareAnnotationTreeSize, 1 FomulaSimplifications, 594 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 561 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 7.9s InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 47 ConstructedInterpolants, 4 QuantifiedInterpolants, 1521 SizeOfPredicates, 11 NumberOfNonLiveVariables, 69 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 9/30 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...