java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/toy/nonlinear/Power2-Unsafe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:52:56,925 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:52:56,927 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:52:56,939 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:52:56,939 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:52:56,940 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:52:56,941 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:52:56,943 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:52:56,945 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:52:56,946 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:52:56,946 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 20:52:56,947 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 20:52:56,948 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 20:52:56,949 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 20:52:56,950 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 20:52:56,951 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 20:52:56,951 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 20:52:56,953 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 20:52:56,955 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 20:52:56,957 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 20:52:56,958 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 20:52:56,959 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 20:52:56,962 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-30 20:52:56,962 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-30 20:52:56,962 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-30 20:52:56,963 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-30 20:52:56,964 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-30 20:52:56,965 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-30 20:52:56,966 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-30 20:52:56,968 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-30 20:52:56,969 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-30 20:52:56,969 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-30 20:52:56,970 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-30 20:52:56,970 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-30 20:52:56,971 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-30 20:52:56,972 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-30 20:52:56,973 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-30 20:52:57,004 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:52:57,004 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:52:57,005 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:52:57,005 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:52:57,006 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:52:57,006 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:52:57,006 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:52:57,007 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:52:57,007 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:52:57,007 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:52:57,007 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:52:57,007 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:52:57,007 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:52:57,008 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:52:57,008 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:52:57,008 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:52:57,008 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:52:57,008 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:52:57,009 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:52:57,009 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:52:57,009 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:52:57,009 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:52:57,009 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:52:57,010 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:52:57,010 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:52:57,012 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:52:57,013 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:52:57,013 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:52:57,013 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:52:57,013 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:52:57,013 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 20:52:57,086 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:52:57,100 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:52:57,105 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:52:57,107 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:52:57,108 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:52:57,108 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Power2-Unsafe.bpl [2018-09-30 20:52:57,109 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Power2-Unsafe.bpl' [2018-09-30 20:52:57,164 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:52:57,169 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:52:57,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:52:57,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:52:57,172 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:52:57,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:57" (1/1) ... [2018-09-30 20:52:57,207 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:57" (1/1) ... [2018-09-30 20:52:57,212 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 20:52:57,212 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 20:52:57,212 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 20:52:57,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:52:57,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:52:57,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:52:57,216 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:52:57,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:57" (1/1) ... [2018-09-30 20:52:57,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:57" (1/1) ... [2018-09-30 20:52:57,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:57" (1/1) ... [2018-09-30 20:52:57,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:57" (1/1) ... [2018-09-30 20:52:57,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:57" (1/1) ... [2018-09-30 20:52:57,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:57" (1/1) ... [2018-09-30 20:52:57,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:57" (1/1) ... [2018-09-30 20:52:57,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:52:57,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:52:57,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:52:57,244 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:52:57,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:57" (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 [2018-09-30 20:52:57,320 INFO L124 BoogieDeclarations]: Specification and implementation of procedure power given in one single declaration [2018-09-30 20:52:57,320 INFO L130 BoogieDeclarations]: Found specification of procedure power [2018-09-30 20:52:57,321 INFO L138 BoogieDeclarations]: Found implementation of procedure power [2018-09-30 20:52:57,392 WARN L639 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-09-30 20:52:57,475 INFO L345 CfgBuilder]: Using library mode [2018-09-30 20:52:57,476 INFO L202 PluginConnector]: Adding new model Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:52:57 BoogieIcfgContainer [2018-09-30 20:52:57,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:52:57,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:52:57,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:52:57,480 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:52:57,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:57" (1/2) ... [2018-09-30 20:52:57,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746c5de and model type Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:52:57, skipping insertion in model container [2018-09-30 20:52:57,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:52:57" (2/2) ... [2018-09-30 20:52:57,484 INFO L112 eAbstractionObserver]: Analyzing ICFG Power2-Unsafe.bpl [2018-09-30 20:52:57,494 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:52:57,502 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:52:57,552 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:52:57,553 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:52:57,553 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:52:57,553 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:52:57,554 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:52:57,554 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:52:57,554 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:52:57,554 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:52:57,554 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:52:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 20:52:57,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:52:57,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:57,577 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:52:57,578 INFO L423 AbstractCegarLoop]: === Iteration 1 === [powerErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:52:57,587 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:57,587 INFO L82 PathProgramCache]: Analyzing trace with hash 924708, now seen corresponding path program 1 times [2018-09-30 20:52:57,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:57,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:57,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:57,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:57,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:57,684 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:52:57,684 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:52:57,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:52:57,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:57,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:57,993 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:52:57,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:52:57,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:52:58,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:52:58,010 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:58,012 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 5 states. [2018-09-30 20:52:58,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:58,273 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 20:52:58,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:52:58,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-30 20:52:58,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:58,287 INFO L225 Difference]: With dead ends: 10 [2018-09-30 20:52:58,288 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 20:52:58,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 20:52:58,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 20:52:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 20:52:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 20:52:58,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 20:52:58,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:58,327 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 20:52:58,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:52:58,327 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 20:52:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:52:58,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:58,328 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 20:52:58,328 INFO L423 AbstractCegarLoop]: === Iteration 2 === [powerErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:52:58,328 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:58,328 INFO L82 PathProgramCache]: Analyzing trace with hash 28663973, now seen corresponding path program 1 times [2018-09-30 20:52:58,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:58,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:58,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:58,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:58,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:58,333 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:52:58,333 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:52:58,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:52:58,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:58,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:58,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:52:58,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-09-30 20:52:58,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:52:58,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:52:58,541 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:58,541 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-30 20:52:59,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:59,045 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 20:52:59,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:52:59,046 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-30 20:52:59,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:59,047 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:52:59,047 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:52:59,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:59,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:52:59,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:52:59,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:52:59,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 20:52:59,052 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 20:52:59,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:59,053 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 20:52:59,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:52:59,053 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 20:52:59,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:52:59,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:59,054 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 20:52:59,054 INFO L423 AbstractCegarLoop]: === Iteration 3 === [powerErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:52:59,054 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:59,055 INFO L82 PathProgramCache]: Analyzing trace with hash 888581188, now seen corresponding path program 2 times [2018-09-30 20:52:59,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:59,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:59,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:59,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:59,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:59,060 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:52:59,060 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:52:59,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:52:59,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:59,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:59,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is sat [2018-09-30 20:52:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-09-30 20:52:59,139 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-09-30 20:52:59,152 WARN L389 cessorBacktranslator]: Generated EnsuresSpecification ensures res >= a * b; is not ensure(true) [2018-09-30 20:52:59,162 INFO L202 PluginConnector]: Adding new model Power2-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:52:59 BoogieIcfgContainer [2018-09-30 20:52:59,162 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:52:59,163 INFO L168 Benchmark]: Toolchain (without parser) took 1998.68 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. [2018-09-30 20:52:59,166 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:52:59,167 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.01 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:52:59,168 INFO L168 Benchmark]: Boogie Preprocessor took 27.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:52:59,169 INFO L168 Benchmark]: RCFGBuilder took 232.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:52:59,170 INFO L168 Benchmark]: TraceAbstraction took 1685.60 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 76.7 MB). Peak memory consumption was 76.7 MB. Max. memory is 7.1 GB. [2018-09-30 20:52:59,175 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.01 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 232.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1685.60 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 76.7 MB). Peak memory consumption was 76.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures res >= a * b; is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: procedure postcondition can be violated procedure postcondition can be violated We found a FailurePath: [L9-L10] requires a >= 1 && b >= 0; VAL [a=1, b=2] [L15] res := 1; [L16] tmp := b; VAL [a=1, b=2, res=1, tmp=2] [L18] COND TRUE tmp > 0 [L20] res := res * a; [L21] tmp := tmp - 1; VAL [a=1, b=2, res=1, tmp=1] [L18] COND TRUE tmp > 0 [L20] res := res * a; [L21] tmp := tmp - 1; VAL [a=1, b=2, res=1, tmp=0] [L18] COND FALSE !(tmp > 0) VAL [a=1, b=2, res=1, tmp=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. UNSAFE Result, 1.6s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3 SDtfs, 14 SDslu, 2 SDs, 0 SdLazy, 34 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 209 SizeOfPredicates, 2 NumberOfNonLiveVariables, 25 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Power2-Unsafe.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-52-59-188.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Power2-Unsafe.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-52-59-188.csv Received shutdown request...