/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_2x3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:49:43,594 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 19:49:43,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:49:43,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:49:43,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:49:43,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:49:43,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:49:43,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:49:43,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:49:43,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:49:43,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:49:43,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:49:43,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:49:43,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:49:43,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 19:49:43,735 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 19:49:43,774 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:49:43,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:49:43,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:49:43,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:49:43,779 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:49:43,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:49:43,779 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:49:43,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:49:43,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:49:43,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:49:43,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:49:43,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:49:43,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:49:43,781 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:49:43,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:49:43,781 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:49:43,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:49:43,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:49:43,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:49:43,782 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:49:43,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:49:43,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:49:43,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:49:43,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:49:43,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:49:43,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:49:43,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:43,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:49:43,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:49:43,785 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 19:49:44,196 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:49:44,234 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:49:44,243 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:49:44,245 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:49:44,245 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:49:44,246 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2020-07-21 19:49:44,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/705ddf57a/046241bcca4a4af1a5d2548239797bd8/FLAG09ab854b1 [2020-07-21 19:49:45,209 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:49:45,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2020-07-21 19:49:45,222 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/705ddf57a/046241bcca4a4af1a5d2548239797bd8/FLAG09ab854b1 [2020-07-21 19:49:45,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/705ddf57a/046241bcca4a4af1a5d2548239797bd8 [2020-07-21 19:49:45,265 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:49:45,269 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:49:45,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:49:45,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:49:45,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:49:45,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:49:45" (1/1) ... [2020-07-21 19:49:45,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3898ef81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:49:45, skipping insertion in model container [2020-07-21 19:49:45,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:49:45" (1/1) ... [2020-07-21 19:49:45,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:49:45,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:49:45,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:49:45,604 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:49:45,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:49:45,649 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:49:45,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:49:45 WrapperNode [2020-07-21 19:49:45,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:49:45,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:49:45,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:49:45,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:49:45,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:49:45" (1/1) ... [2020-07-21 19:49:45,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:49:45" (1/1) ... [2020-07-21 19:49:45,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:49:45" (1/1) ... [2020-07-21 19:49:45,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:49:45" (1/1) ... [2020-07-21 19:49:45,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:49:45" (1/1) ... [2020-07-21 19:49:45,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:49:45" (1/1) ... [2020-07-21 19:49:45,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:49:45" (1/1) ... [2020-07-21 19:49:45,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:49:45,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:49:45,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:49:45,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:49:45,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:49:45" (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 [2020-07-21 19:49:45,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:49:45,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:49:45,915 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-21 19:49:45,915 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:49:45,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:49:45,916 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-21 19:49:45,916 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:49:45,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:49:45,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:49:46,166 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:49:46,167 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:49:46,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:49:46 BoogieIcfgContainer [2020-07-21 19:49:46,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:49:46,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:49:46,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:49:46,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:49:46,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:49:45" (1/3) ... [2020-07-21 19:49:46,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f862031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:49:46, skipping insertion in model container [2020-07-21 19:49:46,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:49:45" (2/3) ... [2020-07-21 19:49:46,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f862031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:49:46, skipping insertion in model container [2020-07-21 19:49:46,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:49:46" (3/3) ... [2020-07-21 19:49:46,187 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_2x3-2.c [2020-07-21 19:49:46,204 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:49:46,215 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:49:46,234 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:49:46,273 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:49:46,273 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:49:46,274 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:49:46,274 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:49:46,274 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:49:46,274 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:49:46,274 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:49:46,275 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:49:46,300 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 19:49:46,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 19:49:46,309 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:49:46,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:49:46,312 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:49:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:49:46,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-21 19:49:46,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:49:46,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029513264] [2020-07-21 19:49:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:46,432 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:49:46,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:49:46,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:49:46,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:49:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:49:46,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:49:46,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029513264] [2020-07-21 19:49:46,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:49:46,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:49:46,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021487020] [2020-07-21 19:49:46,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:49:46,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:49:46,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:49:46,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:49:46,701 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 19:49:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:49:46,877 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-21 19:49:46,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:49:46,881 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 19:49:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:49:46,897 INFO L225 Difference]: With dead ends: 30 [2020-07-21 19:49:46,898 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 19:49:46,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:49:46,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 19:49:46,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 19:49:46,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 19:49:46,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 19:49:46,979 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 19:49:46,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:49:46,980 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 19:49:46,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:49:46,981 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 19:49:46,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 19:49:46,985 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:49:46,985 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:49:47,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:47,202 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:49:47,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:49:47,205 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-21 19:49:47,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:49:47,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572291940] [2020-07-21 19:49:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:47,328 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:49:47,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:49:47,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:49:47,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:49:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 19:49:47,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:49:47,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:49:47,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572291940] [2020-07-21 19:49:47,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:49:47,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-21 19:49:47,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580185788] [2020-07-21 19:49:47,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 19:49:47,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:49:47,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 19:49:47,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 19:49:47,789 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-07-21 19:49:47,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:49:47,913 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-21 19:49:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 19:49:47,915 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-21 19:49:47,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:49:47,917 INFO L225 Difference]: With dead ends: 25 [2020-07-21 19:49:47,918 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 19:49:47,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 19:49:47,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 19:49:47,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 19:49:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 19:49:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-21 19:49:47,933 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-21 19:49:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:49:47,934 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-21 19:49:47,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 19:49:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-21 19:49:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 19:49:47,936 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:49:47,937 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:49:48,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:48,150 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:49:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:49:48,151 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-21 19:49:48,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:49:48,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196214027] [2020-07-21 19:49:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:48,212 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:49:48,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:49:48,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 19:49:48,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:49:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 19:49:48,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:49:49,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 19:49:49,300 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:49:49,303 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:49:49,308 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:49:49,314 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 19:49:49,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:49,320 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:49:49,322 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:49:49,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:49,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:49,330 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:49:49,335 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:49:49,338 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:49:49,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 19:49:49,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:49,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 19:49:49,619 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:49:49,621 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:49:49,625 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:49:49,630 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:49:49,633 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-21 19:49:49,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:49,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:49,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:49,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:49,650 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:49:49,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:49,656 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:49:49,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:49,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 19:49:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 19:49:49,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196214027] [2020-07-21 19:49:49,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:49:49,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2020-07-21 19:49:49,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049161849] [2020-07-21 19:49:49,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:49:49,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:49:49,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:49:49,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:49:49,838 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 21 states. [2020-07-21 19:49:50,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:49:50,212 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-21 19:49:50,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:49:50,214 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-07-21 19:49:50,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:49:50,215 INFO L225 Difference]: With dead ends: 28 [2020-07-21 19:49:50,215 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 19:49:50,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:49:50,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 19:49:50,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 19:49:50,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 19:49:50,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 19:49:50,231 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-21 19:49:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:49:50,232 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 19:49:50,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:49:50,233 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 19:49:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 19:49:50,234 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:49:50,235 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:49:50,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:50,451 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:49:50,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:49:50,452 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-21 19:49:50,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:49:50,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461934145] [2020-07-21 19:49:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:50,505 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:49:50,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:49:50,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:49:50,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:49:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 19:49:50,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:49:50,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:50,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:50,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 19:49:50,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461934145] [2020-07-21 19:49:50,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:49:50,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2020-07-21 19:49:50,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661756338] [2020-07-21 19:49:50,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 19:49:50,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:49:50,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 19:49:50,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-21 19:49:50,992 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-07-21 19:49:51,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:49:51,068 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-07-21 19:49:51,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:49:51,069 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-21 19:49:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:49:51,070 INFO L225 Difference]: With dead ends: 24 [2020-07-21 19:49:51,071 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 19:49:51,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:49:51,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 19:49:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 19:49:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 19:49:51,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 19:49:51,074 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-07-21 19:49:51,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:49:51,075 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 19:49:51,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 19:49:51,075 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 19:49:51,076 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 19:49:51,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:51,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 19:49:51,404 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 19:49:51,405 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:49:51,405 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:49:51,405 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 19:49:51,405 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 19:49:51,405 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 19:49:51,405 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-21 19:49:51,406 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (<= sum_~n |sum_#in~n|) (<= 1 |sum_#in~n|) (<= |sum_#in~n| sum_~n)) [2020-07-21 19:49:51,406 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-21 19:49:51,406 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-21 19:49:51,407 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-21 19:49:51,407 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-21 19:49:51,407 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-21 19:49:51,407 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-21 19:49:51,408 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-21 19:49:51,408 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-21 19:49:51,408 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-21 19:49:51,408 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= 2 main_~a~0) (<= main_~a~0 2)) [2020-07-21 19:49:51,409 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-21 19:49:51,409 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-21 19:49:51,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:49:51 BoogieIcfgContainer [2020-07-21 19:49:51,420 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:49:51,425 INFO L168 Benchmark]: Toolchain (without parser) took 6155.37 ms. Allocated memory was 142.6 MB in the beginning and 251.1 MB in the end (delta: 108.5 MB). Free memory was 99.1 MB in the beginning and 131.7 MB in the end (delta: -32.6 MB). Peak memory consumption was 75.9 MB. Max. memory is 7.1 GB. [2020-07-21 19:49:51,426 INFO L168 Benchmark]: CDTParser took 1.21 ms. Allocated memory is still 142.6 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 19:49:51,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.03 ms. Allocated memory is still 142.6 MB. Free memory was 98.7 MB in the beginning and 89.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-21 19:49:51,428 INFO L168 Benchmark]: Boogie Preprocessor took 42.39 ms. Allocated memory is still 142.6 MB. Free memory was 89.4 MB in the beginning and 88.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 19:49:51,429 INFO L168 Benchmark]: RCFGBuilder took 477.52 ms. Allocated memory was 142.6 MB in the beginning and 202.4 MB in the end (delta: 59.8 MB). Free memory was 88.0 MB in the beginning and 170.9 MB in the end (delta: -82.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 19:49:51,431 INFO L168 Benchmark]: TraceAbstraction took 5244.52 ms. Allocated memory was 202.4 MB in the beginning and 251.1 MB in the end (delta: 48.8 MB). Free memory was 170.2 MB in the beginning and 131.7 MB in the end (delta: 38.5 MB). Peak memory consumption was 87.3 MB. Max. memory is 7.1 GB. [2020-07-21 19:49:51,436 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.21 ms. Allocated memory is still 142.6 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 381.03 ms. Allocated memory is still 142.6 MB. Free memory was 98.7 MB in the beginning and 89.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.39 ms. Allocated memory is still 142.6 MB. Free memory was 89.4 MB in the beginning and 88.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 477.52 ms. Allocated memory was 142.6 MB in the beginning and 202.4 MB in the end (delta: 59.8 MB). Free memory was 88.0 MB in the beginning and 170.9 MB in the end (delta: -82.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5244.52 ms. Allocated memory was 202.4 MB in the beginning and 251.1 MB in the end (delta: 48.8 MB). Free memory was 170.2 MB in the beginning and 131.7 MB in the end (delta: 38.5 MB). Peak memory consumption was 87.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.0s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 52 SDtfs, 58 SDslu, 179 SDs, 0 SdLazy, 174 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 113 SyntacticMatches, 13 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 25 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 88 NumberOfCodeBlocks, 73 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 156 ConstructedInterpolants, 0 QuantifiedInterpolants, 17760 SizeOfPredicates, 19 NumberOfNonLiveVariables, 227 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 59/96 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...