/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Addition01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:40:33,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:40:33,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:40:33,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:40:33,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:40:33,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:40:33,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:40:33,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:40:33,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:40:33,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:40:33,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:40:33,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:40:33,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:40:33,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:40:33,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:40:33,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:40:33,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:40:33,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:40:33,409 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:40:33,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:40:33,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:40:33,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:40:33,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:40:33,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:40:33,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:40:33,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:40:33,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:40:33,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:40:33,427 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 10:40:33,442 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:40:33,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:40:33,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:40:33,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:40:33,449 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:40:33,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:40:33,449 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:40:33,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:40:33,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:40:33,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:40:33,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:40:33,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:40:33,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:40:33,450 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:40:33,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:40:33,451 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:40:33,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:40:33,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:40:33,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:40:33,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:40:33,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:40:33,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:40:33,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:40:33,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:40:33,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:40:33,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:40:33,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:33,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:40:33,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:40:33,453 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 -> NOT_INCREMENTALLY [2020-07-21 10:40:33,742 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:40:33,755 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:40:33,758 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:40:33,759 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:40:33,760 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:40:33,761 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition01-2.c [2020-07-21 10:40:33,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daf20b5aa/3a3ab4009c3f4c26aa13b7068dc7b8cf/FLAGafd9189c5 [2020-07-21 10:40:34,254 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:40:34,255 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition01-2.c [2020-07-21 10:40:34,262 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daf20b5aa/3a3ab4009c3f4c26aa13b7068dc7b8cf/FLAGafd9189c5 [2020-07-21 10:40:34,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daf20b5aa/3a3ab4009c3f4c26aa13b7068dc7b8cf [2020-07-21 10:40:34,703 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:40:34,707 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:40:34,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:34,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:40:34,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:40:34,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:34" (1/1) ... [2020-07-21 10:40:34,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bd08649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34, skipping insertion in model container [2020-07-21 10:40:34,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:34" (1/1) ... [2020-07-21 10:40:34,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:40:34,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:40:34,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:34,937 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:40:34,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:34,967 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:40:34,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34 WrapperNode [2020-07-21 10:40:34,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:34,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:40:34,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:40:34,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:40:34,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (1/1) ... [2020-07-21 10:40:34,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (1/1) ... [2020-07-21 10:40:34,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (1/1) ... [2020-07-21 10:40:34,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (1/1) ... [2020-07-21 10:40:34,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (1/1) ... [2020-07-21 10:40:34,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (1/1) ... [2020-07-21 10:40:34,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (1/1) ... [2020-07-21 10:40:34,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:40:34,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:40:34,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:40:34,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:40:34,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (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 10:40:35,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:40:35,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:40:35,140 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-07-21 10:40:35,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:40:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:40:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:40:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-07-21 10:40:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:40:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:40:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:40:35,335 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:40:35,335 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:40:35,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:35 BoogieIcfgContainer [2020-07-21 10:40:35,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:40:35,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:40:35,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:40:35,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:40:35,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:40:34" (1/3) ... [2020-07-21 10:40:35,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8423c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:35, skipping insertion in model container [2020-07-21 10:40:35,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (2/3) ... [2020-07-21 10:40:35,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8423c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:35, skipping insertion in model container [2020-07-21 10:40:35,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:35" (3/3) ... [2020-07-21 10:40:35,347 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition01-2.c [2020-07-21 10:40:35,356 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:40:35,362 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:40:35,376 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:40:35,399 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:40:35,399 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:40:35,399 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:40:35,399 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:40:35,399 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:40:35,400 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:40:35,400 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:40:35,400 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:40:35,417 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-21 10:40:35,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 10:40:35,423 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:35,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:35,425 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:35,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:35,430 INFO L82 PathProgramCache]: Analyzing trace with hash -854965079, now seen corresponding path program 1 times [2020-07-21 10:40:35,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:35,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5590682] [2020-07-21 10:40:35,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 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 10:40:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:35,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 10:40:35,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:35,708 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 10:40:35,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:35,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5590682] [2020-07-21 10:40:35,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:35,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 10:40:35,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922692702] [2020-07-21 10:40:35,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 10:40:35,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:35,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 10:40:35,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 10:40:35,733 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 7 states. [2020-07-21 10:40:35,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:35,866 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-21 10:40:35,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:40:35,869 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-07-21 10:40:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:35,879 INFO L225 Difference]: With dead ends: 40 [2020-07-21 10:40:35,880 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 10:40:35,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 10:40:35,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 10:40:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 10:40:35,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 10:40:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-21 10:40:35,929 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-07-21 10:40:35,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:35,930 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-21 10:40:35,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 10:40:35,930 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-21 10:40:35,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 10:40:35,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:35,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:36,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:36,147 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:36,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:36,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1632999070, now seen corresponding path program 1 times [2020-07-21 10:40:36,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:36,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018003678] [2020-07-21 10:40:36,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 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 10:40:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:36,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 10:40:36,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:36,201 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 10:40:36,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:36,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018003678] [2020-07-21 10:40:36,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:36,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 10:40:36,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388783648] [2020-07-21 10:40:36,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 10:40:36,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:36,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 10:40:36,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 10:40:36,206 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2020-07-21 10:40:36,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:36,233 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-07-21 10:40:36,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 10:40:36,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-21 10:40:36,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:36,235 INFO L225 Difference]: With dead ends: 34 [2020-07-21 10:40:36,235 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 10:40:36,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 10:40:36,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 10:40:36,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-21 10:40:36,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 10:40:36,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-21 10:40:36,245 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2020-07-21 10:40:36,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:36,245 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-21 10:40:36,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 10:40:36,246 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-21 10:40:36,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 10:40:36,247 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:36,247 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:36,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:36,461 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:36,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:36,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1746800232, now seen corresponding path program 1 times [2020-07-21 10:40:36,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:36,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927526967] [2020-07-21 10:40:36,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:40:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:36,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 10:40:36,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:36,648 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 10:40:36,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:37,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:37,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:37,098 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 10:40:37,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927526967] [2020-07-21 10:40:37,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:37,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-07-21 10:40:37,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077853818] [2020-07-21 10:40:37,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:40:37,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:37,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:40:37,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:40:37,103 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 17 states. [2020-07-21 10:40:37,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:37,434 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-07-21 10:40:37,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:40:37,434 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2020-07-21 10:40:37,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:37,436 INFO L225 Difference]: With dead ends: 38 [2020-07-21 10:40:37,436 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 10:40:37,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:40:37,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 10:40:37,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-07-21 10:40:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 10:40:37,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-21 10:40:37,445 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2020-07-21 10:40:37,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:37,445 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-21 10:40:37,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:40:37,446 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-21 10:40:37,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 10:40:37,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:37,447 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:37,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:37,661 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:37,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:37,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1365148867, now seen corresponding path program 1 times [2020-07-21 10:40:37,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:37,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743606555] [2020-07-21 10:40:37,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:40:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:37,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:40:37,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:40:37,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:40:37,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743606555] [2020-07-21 10:40:37,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:37,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-21 10:40:37,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425490144] [2020-07-21 10:40:37,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 10:40:37,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:37,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 10:40:37,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:40:37,803 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-07-21 10:40:37,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:37,875 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-21 10:40:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:40:37,876 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-21 10:40:37,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:37,877 INFO L225 Difference]: With dead ends: 31 [2020-07-21 10:40:37,877 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 10:40:37,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 10:40:37,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 10:40:37,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 10:40:37,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 10:40:37,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-07-21 10:40:37,890 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 23 [2020-07-21 10:40:37,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:37,891 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-07-21 10:40:37,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 10:40:37,892 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-07-21 10:40:37,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 10:40:37,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:37,895 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:38,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:38,096 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:38,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1459427924, now seen corresponding path program 1 times [2020-07-21 10:40:38,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:38,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728648836] [2020-07-21 10:40:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:38,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:40:38,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:40:38,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:40:38,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728648836] [2020-07-21 10:40:38,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:38,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-21 10:40:38,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967251430] [2020-07-21 10:40:38,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 10:40:38,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:38,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 10:40:38,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:40:38,262 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 6 states. [2020-07-21 10:40:38,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:38,314 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2020-07-21 10:40:38,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:40:38,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-07-21 10:40:38,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:38,316 INFO L225 Difference]: With dead ends: 32 [2020-07-21 10:40:38,316 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 10:40:38,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 10:40:38,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 10:40:38,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 10:40:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 10:40:38,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 10:40:38,319 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2020-07-21 10:40:38,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:38,319 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 10:40:38,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 10:40:38,319 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 10:40:38,319 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 10:40:38,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:38,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 10:40:38,672 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 10:40:38,672 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:40:38,672 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:40:38,672 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 10:40:38,672 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 10:40:38,672 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 10:40:38,673 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-21 10:40:38,673 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 45) the Hoare annotation is: true [2020-07-21 10:40:38,673 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-07-21 10:40:38,673 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 45) no Hoare annotation was computed. [2020-07-21 10:40:38,677 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 45) no Hoare annotation was computed. [2020-07-21 10:40:38,677 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-21 10:40:38,677 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-21 10:40:38,677 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (<= 0 main_~n~0) [2020-07-21 10:40:38,678 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-21 10:40:38,678 INFO L268 CegarLoopResult]: For program point L34(lines 34 38) no Hoare annotation was computed. [2020-07-21 10:40:38,678 INFO L268 CegarLoopResult]: For program point additionFINAL(lines 13 23) no Hoare annotation was computed. [2020-07-21 10:40:38,678 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (= |addition_#in~n| addition_~n) (<= addition_~n 0) (= |addition_#in~m| addition_~m) (not (= 0 addition_~n))) [2020-07-21 10:40:38,678 INFO L268 CegarLoopResult]: For program point L20(lines 20 22) no Hoare annotation was computed. [2020-07-21 10:40:38,678 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-21 10:40:38,679 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (= |addition_#in~n| addition_~n) (= |addition_#in~m| addition_~m) (< 0 addition_~n)) [2020-07-21 10:40:38,679 INFO L268 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-07-21 10:40:38,679 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-07-21 10:40:38,679 INFO L271 CegarLoopResult]: At program point additionENTRY(lines 13 23) the Hoare annotation is: true [2020-07-21 10:40:38,679 INFO L268 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-07-21 10:40:38,679 INFO L268 CegarLoopResult]: For program point additionEXIT(lines 13 23) no Hoare annotation was computed. [2020-07-21 10:40:38,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:40:38 BoogieIcfgContainer [2020-07-21 10:40:38,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:40:38,693 INFO L168 Benchmark]: Toolchain (without parser) took 3985.43 ms. Allocated memory was 145.2 MB in the beginning and 246.4 MB in the end (delta: 101.2 MB). Free memory was 101.4 MB in the beginning and 189.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:38,694 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 145.2 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 10:40:38,697 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.80 ms. Allocated memory is still 145.2 MB. Free memory was 101.0 MB in the beginning and 91.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:38,698 INFO L168 Benchmark]: Boogie Preprocessor took 26.23 ms. Allocated memory is still 145.2 MB. Free memory was 91.5 MB in the beginning and 90.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:38,699 INFO L168 Benchmark]: RCFGBuilder took 344.20 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 90.1 MB in the beginning and 168.2 MB in the end (delta: -78.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:38,700 INFO L168 Benchmark]: TraceAbstraction took 3348.32 ms. Allocated memory was 201.9 MB in the beginning and 246.4 MB in the end (delta: 44.6 MB). Free memory was 167.6 MB in the beginning and 189.6 MB in the end (delta: -22.0 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:38,703 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 145.2 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.80 ms. Allocated memory is still 145.2 MB. Free memory was 101.0 MB in the beginning and 91.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.23 ms. Allocated memory is still 145.2 MB. Free memory was 91.5 MB in the beginning and 90.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 344.20 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 90.1 MB in the beginning and 168.2 MB in the end (delta: -78.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3348.32 ms. Allocated memory was 201.9 MB in the beginning and 246.4 MB in the end (delta: 44.6 MB). Free memory was 167.6 MB in the beginning and 189.6 MB in the end (delta: -22.0 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.1s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 77 SDslu, 256 SDs, 0 SdLazy, 329 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 189 GetRequests, 142 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=4, 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, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 32 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 174 ConstructedInterpolants, 0 QuantifiedInterpolants, 11654 SizeOfPredicates, 20 NumberOfNonLiveVariables, 302 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 32/42 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...