/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -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 01:02:45,415 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 01:02:45,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:02:45,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:02:45,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:02:45,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:02:45,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:02:45,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:02:45,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:02:45,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:02:45,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:02:45,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:02:45,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:02:45,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:02:45,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:02:45,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:02:45,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:02:45,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:02:45,545 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 01:02:45,590 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:02:45,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:02:45,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:02:45,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:02:45,596 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:02:45,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:02:45,597 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:02:45,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:02:45,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:02:45,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:02:45,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:02:45,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:02:45,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:02:45,600 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:02:45,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:02:45,601 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:02:45,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:02:45,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:02:45,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:02:45,604 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:02:45,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:02:45,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:02:45,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:02:45,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:02:45,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:02:45,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:02:45,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:02:45,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:02:45,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:02:45,609 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 -> BIGGEST_EQUIVALENCE_CLASS 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 -> 4 [2020-07-21 01:02:45,980 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:02:46,001 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:02:46,006 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:02:46,009 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:02:46,010 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:02:46,011 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2020-07-21 01:02:46,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee8a7ddaf/392be338ad69494789a1ff942d72b113/FLAGcebccbfac [2020-07-21 01:02:46,829 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:02:46,831 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2020-07-21 01:02:46,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee8a7ddaf/392be338ad69494789a1ff942d72b113/FLAGcebccbfac [2020-07-21 01:02:47,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee8a7ddaf/392be338ad69494789a1ff942d72b113 [2020-07-21 01:02:47,188 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:02:47,194 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:02:47,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:02:47,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:02:47,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:02:47,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:02:47" (1/1) ... [2020-07-21 01:02:47,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@631512b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:02:47, skipping insertion in model container [2020-07-21 01:02:47,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:02:47" (1/1) ... [2020-07-21 01:02:47,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:02:47,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:02:47,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:02:47,463 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:02:47,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:02:47,504 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:02:47,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:02:47 WrapperNode [2020-07-21 01:02:47,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:02:47,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:02:47,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:02:47,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:02:47,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:02:47" (1/1) ... [2020-07-21 01:02:47,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:02:47" (1/1) ... [2020-07-21 01:02:47,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:02:47" (1/1) ... [2020-07-21 01:02:47,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:02:47" (1/1) ... [2020-07-21 01:02:47,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:02:47" (1/1) ... [2020-07-21 01:02:47,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:02:47" (1/1) ... [2020-07-21 01:02:47,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:02:47" (1/1) ... [2020-07-21 01:02:47,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:02:47,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:02:47,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:02:47,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:02:47,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:02:47" (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 01:02:47,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:02:47,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:02:47,757 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-21 01:02:47,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:02:47,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:02:47,757 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-21 01:02:47,757 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:02:47,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:02:47,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:02:47,966 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:02:47,966 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 01:02:47,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:02:47 BoogieIcfgContainer [2020-07-21 01:02:47,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:02:47,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:02:47,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:02:47,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:02:47,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:02:47" (1/3) ... [2020-07-21 01:02:47,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0992b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:02:47, skipping insertion in model container [2020-07-21 01:02:47,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:02:47" (2/3) ... [2020-07-21 01:02:47,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0992b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:02:47, skipping insertion in model container [2020-07-21 01:02:47,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:02:47" (3/3) ... [2020-07-21 01:02:47,986 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_2x3-2.c [2020-07-21 01:02:48,002 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:02:48,014 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:02:48,035 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:02:48,069 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:02:48,069 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:02:48,070 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:02:48,070 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:02:48,070 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:02:48,070 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:02:48,070 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:02:48,071 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:02:48,097 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 01:02:48,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 01:02:48,108 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:02:48,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:02:48,110 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:02:48,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:02:48,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-21 01:02:48,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:02:48,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457147319] [2020-07-21 01:02:48,133 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 01:02:48,225 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:02:48,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:02:48,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:02:48,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:02:48,429 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 01:02:48,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:02:48,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457147319] [2020-07-21 01:02:48,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:02:48,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:02:48,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221804396] [2020-07-21 01:02:48,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:02:48,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:02:48,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:02:48,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:02:48,465 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 01:02:48,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:02:48,581 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-21 01:02:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:02:48,584 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 01:02:48,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:02:48,595 INFO L225 Difference]: With dead ends: 30 [2020-07-21 01:02:48,596 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 01:02:48,600 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 01:02:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 01:02:48,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 01:02:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 01:02:48,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 01:02:48,656 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 01:02:48,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:02:48,657 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 01:02:48,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:02:48,657 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 01:02:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 01:02:48,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:02:48,660 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 01:02:48,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:02:48,862 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:02:48,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:02:48,864 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-21 01:02:48,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:02:48,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410803731] [2020-07-21 01:02:48,868 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 01:02:48,908 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:02:48,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:02:48,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:02:48,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:02:48,995 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 01:02:48,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:02:49,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:02:49,261 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 01:02:49,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410803731] [2020-07-21 01:02:49,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:02:49,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-21 01:02:49,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524385414] [2020-07-21 01:02:49,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 01:02:49,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:02:49,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 01:02:49,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:02:49,268 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-07-21 01:02:49,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:02:49,363 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-21 01:02:49,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:02:49,365 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-21 01:02:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:02:49,367 INFO L225 Difference]: With dead ends: 25 [2020-07-21 01:02:49,367 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 01:02:49,370 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 01:02:49,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 01:02:49,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 01:02:49,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 01:02:49,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-21 01:02:49,381 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-21 01:02:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:02:49,382 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-21 01:02:49,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 01:02:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-21 01:02:49,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 01:02:49,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:02:49,384 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 01:02:49,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:02:49,599 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:02:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:02:49,600 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-21 01:02:49,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:02:49,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867207814] [2020-07-21 01:02:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 01:02:49,648 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:02:49,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:02:49,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 01:02:49,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:02:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 01:02:49,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:02:50,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:02:50,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:02:50,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:02:50,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:02:50,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:02:50,608 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 01:02:50,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:02:50,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:02:50,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:02:50,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:02:50,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:02:50,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:02:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 01:02:50,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867207814] [2020-07-21 01:02:50,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:02:50,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2020-07-21 01:02:50,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537474851] [2020-07-21 01:02:50,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 01:02:50,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:02:50,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 01:02:50,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-07-21 01:02:50,804 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 18 states. [2020-07-21 01:02:51,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:02:51,194 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-21 01:02:51,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 01:02:51,195 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2020-07-21 01:02:51,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:02:51,197 INFO L225 Difference]: With dead ends: 28 [2020-07-21 01:02:51,198 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 01:02:51,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2020-07-21 01:02:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 01:02:51,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 01:02:51,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 01:02:51,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 01:02:51,216 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-21 01:02:51,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:02:51,227 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 01:02:51,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 01:02:51,228 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 01:02:51,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 01:02:51,229 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:02:51,229 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 01:02:51,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:02:51,431 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:02:51,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:02:51,433 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-21 01:02:51,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:02:51,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760196532] [2020-07-21 01:02:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 01:02:51,473 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:02:51,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:02:51,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 01:02:51,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:02:51,537 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 01:02:51,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:02:51,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:02:51,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:02:51,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:02:51,898 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 01:02:51,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760196532] [2020-07-21 01:02:51,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:02:51,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2020-07-21 01:02:51,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913058742] [2020-07-21 01:02:51,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 01:02:51,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:02:51,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 01:02:51,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-21 01:02:51,905 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-07-21 01:02:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:02:51,990 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-07-21 01:02:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:02:51,992 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-21 01:02:51,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:02:51,995 INFO L225 Difference]: With dead ends: 24 [2020-07-21 01:02:51,995 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 01:02:51,996 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 01:02:51,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 01:02:51,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 01:02:51,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 01:02:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 01:02:51,999 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-07-21 01:02:51,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:02:51,999 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 01:02:51,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 01:02:51,999 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 01:02:52,000 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 01:02:52,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:02:52,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 01:02:52,320 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 01:02:52,320 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:02:52,321 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:02:52,321 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 01:02:52,321 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:02:52,321 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:02:52,321 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-21 01:02:52,322 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (<= sum_~n |sum_#in~n|) (< 0 sum_~n) (<= |sum_#in~n| sum_~n)) [2020-07-21 01:02:52,322 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-21 01:02:52,322 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-21 01:02:52,322 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-21 01:02:52,322 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-21 01:02:52,323 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-21 01:02:52,323 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-21 01:02:52,323 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-21 01:02:52,323 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-21 01:02:52,325 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-21 01:02:52,325 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= 2 main_~a~0) [2020-07-21 01:02:52,325 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-21 01:02:52,325 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-21 01:02:52,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:02:52 BoogieIcfgContainer [2020-07-21 01:02:52,337 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:02:52,342 INFO L168 Benchmark]: Toolchain (without parser) took 5151.11 ms. Allocated memory was 140.5 MB in the beginning and 250.1 MB in the end (delta: 109.6 MB). Free memory was 101.0 MB in the beginning and 150.6 MB in the end (delta: -49.5 MB). Peak memory consumption was 60.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:02:52,344 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 140.5 MB. Free memory was 119.3 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 01:02:52,345 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.83 ms. Allocated memory is still 140.5 MB. Free memory was 100.6 MB in the beginning and 91.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-21 01:02:52,347 INFO L168 Benchmark]: Boogie Preprocessor took 43.61 ms. Allocated memory is still 140.5 MB. Free memory was 91.4 MB in the beginning and 90.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:02:52,348 INFO L168 Benchmark]: RCFGBuilder took 423.02 ms. Allocated memory was 140.5 MB in the beginning and 201.9 MB in the end (delta: 61.3 MB). Free memory was 90.0 MB in the beginning and 170.3 MB in the end (delta: -80.3 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 01:02:52,349 INFO L168 Benchmark]: TraceAbstraction took 4363.51 ms. Allocated memory was 201.9 MB in the beginning and 250.1 MB in the end (delta: 48.2 MB). Free memory was 169.6 MB in the beginning and 150.6 MB in the end (delta: 19.1 MB). Peak memory consumption was 67.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:02:52,353 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 140.5 MB. Free memory was 119.3 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 302.83 ms. Allocated memory is still 140.5 MB. Free memory was 100.6 MB in the beginning and 91.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.61 ms. Allocated memory is still 140.5 MB. Free memory was 91.4 MB in the beginning and 90.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 423.02 ms. Allocated memory was 140.5 MB in the beginning and 201.9 MB in the end (delta: 61.3 MB). Free memory was 90.0 MB in the beginning and 170.3 MB in the end (delta: -80.3 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4363.51 ms. Allocated memory was 201.9 MB in the beginning and 250.1 MB in the end (delta: 48.2 MB). Free memory was 169.6 MB in the beginning and 150.6 MB in the end (delta: 19.1 MB). Peak memory consumption was 67.3 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: 4.1s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 51 SDslu, 212 SDs, 0 SdLazy, 226 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 174 GetRequests, 113 SyntacticMatches, 16 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.9s 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, 21 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 88 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 156 ConstructedInterpolants, 0 QuantifiedInterpolants, 14016 SizeOfPredicates, 19 NumberOfNonLiveVariables, 202 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 60/96 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...