java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 16:11:33,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 16:11:33,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 16:11:33,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-16 16:11:33,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 16:11:33,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 16:11:33,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 16:11:33,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 16:11:33,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 16:11:33,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 16:11:33,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 16:11:33,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 16:11:33,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 16:11:33,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 16:11:33,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 16:11:33,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 16:11:33,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 16:11:33,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 16:11:33,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 16:11:33,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 16:11:33,342 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 [2019-09-16 16:11:33,374 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 16:11:33,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 16:11:33,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-16 16:11:33,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-16 16:11:33,376 INFO L138 SettingsManager]: * Use SBE=true [2019-09-16 16:11:33,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 16:11:33,376 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 16:11:33,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-16 16:11:33,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 16:11:33,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 16:11:33,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 16:11:33,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 16:11:33,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 16:11:33,380 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 16:11:33,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 16:11:33,380 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-16 16:11:33,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 16:11:33,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 16:11:33,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 16:11:33,381 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-16 16:11:33,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-16 16:11:33,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 16:11:33,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 16:11:33,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 16:11:33,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-16 16:11:33,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-16 16:11:33,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 16:11:33,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-16 16:11:33,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 16:11:33,416 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 16:11:33,430 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 16:11:33,434 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 16:11:33,437 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 16:11:33,437 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 16:11:33,437 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2019-09-16 16:11:33,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc4d0c583/4428b83d091d4bae809cbca443738cb7/FLAG9f898c88b [2019-09-16 16:11:33,942 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 16:11:33,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2019-09-16 16:11:33,949 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc4d0c583/4428b83d091d4bae809cbca443738cb7/FLAG9f898c88b [2019-09-16 16:11:34,364 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc4d0c583/4428b83d091d4bae809cbca443738cb7 [2019-09-16 16:11:34,379 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 16:11:34,380 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 16:11:34,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 16:11:34,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 16:11:34,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 16:11:34,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:11:34" (1/1) ... [2019-09-16 16:11:34,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@682ee9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:34, skipping insertion in model container [2019-09-16 16:11:34,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:11:34" (1/1) ... [2019-09-16 16:11:34,396 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 16:11:34,410 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 16:11:34,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:11:34,605 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 16:11:34,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:11:34,640 INFO L192 MainTranslator]: Completed translation [2019-09-16 16:11:34,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:34 WrapperNode [2019-09-16 16:11:34,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 16:11:34,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 16:11:34,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 16:11:34,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 16:11:34,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:34" (1/1) ... [2019-09-16 16:11:34,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:34" (1/1) ... [2019-09-16 16:11:34,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:34" (1/1) ... [2019-09-16 16:11:34,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:34" (1/1) ... [2019-09-16 16:11:34,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:34" (1/1) ... [2019-09-16 16:11:34,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:34" (1/1) ... [2019-09-16 16:11:34,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:34" (1/1) ... [2019-09-16 16:11:34,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 16:11:34,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 16:11:34,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 16:11:34,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 16:11:34,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:34" (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 [2019-09-16 16:11:34,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 16:11:34,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 16:11:34,817 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-16 16:11:34,817 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 16:11:34,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 16:11:34,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 16:11:34,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-16 16:11:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 16:11:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 16:11:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 16:11:34,989 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 16:11:34,989 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-16 16:11:34,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:11:34 BoogieIcfgContainer [2019-09-16 16:11:34,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 16:11:34,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 16:11:34,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 16:11:34,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 16:11:34,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 04:11:34" (1/3) ... [2019-09-16 16:11:34,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5154ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:11:34, skipping insertion in model container [2019-09-16 16:11:34,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:34" (2/3) ... [2019-09-16 16:11:34,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5154ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:11:34, skipping insertion in model container [2019-09-16 16:11:34,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:11:34" (3/3) ... [2019-09-16 16:11:35,004 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2019-09-16 16:11:35,019 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 16:11:35,027 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 16:11:35,045 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 16:11:35,086 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-16 16:11:35,089 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 16:11:35,090 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-16 16:11:35,090 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 16:11:35,090 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 16:11:35,090 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 16:11:35,090 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 16:11:35,090 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 16:11:35,090 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 16:11:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-16 16:11:35,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-16 16:11:35,125 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:35,126 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:35,130 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:35,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:35,136 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2019-09-16 16:11:35,138 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:35,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:35,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:35,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:35,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:35,262 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:11:35,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-16 16:11:35,265 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 16:11:35,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 16:11:35,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 16:11:35,278 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-09-16 16:11:35,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:35,295 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-09-16 16:11:35,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 16:11:35,297 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-16 16:11:35,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:35,305 INFO L225 Difference]: With dead ends: 30 [2019-09-16 16:11:35,305 INFO L226 Difference]: Without dead ends: 13 [2019-09-16 16:11:35,308 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 16:11:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-16 16:11:35,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-16 16:11:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-16 16:11:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-09-16 16:11:35,344 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-09-16 16:11:35,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:35,345 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-09-16 16:11:35,345 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 16:11:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-09-16 16:11:35,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-16 16:11:35,346 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:35,346 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:35,346 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:35,347 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2019-09-16 16:11:35,347 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:35,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:35,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:35,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:35,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:35,428 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:11:35,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-16 16:11:35,430 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-16 16:11:35,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-16 16:11:35,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-16 16:11:35,431 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2019-09-16 16:11:35,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:35,472 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-09-16 16:11:35,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-16 16:11:35,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-16 16:11:35,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:35,475 INFO L225 Difference]: With dead ends: 19 [2019-09-16 16:11:35,475 INFO L226 Difference]: Without dead ends: 14 [2019-09-16 16:11:35,476 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-16 16:11:35,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-16 16:11:35,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-16 16:11:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-16 16:11:35,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-09-16 16:11:35,481 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-09-16 16:11:35,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:35,481 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-09-16 16:11:35,482 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-16 16:11:35,482 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-09-16 16:11:35,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-16 16:11:35,482 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:35,483 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:35,483 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:35,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:35,483 INFO L82 PathProgramCache]: Analyzing trace with hash 137668885, now seen corresponding path program 1 times [2019-09-16 16:11:35,484 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:35,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:35,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:35,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:35,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:35,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:35,667 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:35,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:35,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-16 16:11:35,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:35,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:11:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:35,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:35,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-09-16 16:11:35,867 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-16 16:11:35,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-16 16:11:35,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-09-16 16:11:35,869 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 14 states. [2019-09-16 16:11:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:36,057 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2019-09-16 16:11:36,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-16 16:11:36,059 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2019-09-16 16:11:36,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:36,060 INFO L225 Difference]: With dead ends: 32 [2019-09-16 16:11:36,060 INFO L226 Difference]: Without dead ends: 20 [2019-09-16 16:11:36,061 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-09-16 16:11:36,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-16 16:11:36,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-16 16:11:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-16 16:11:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-09-16 16:11:36,070 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2019-09-16 16:11:36,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:36,071 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-09-16 16:11:36,071 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-16 16:11:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-09-16 16:11:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-16 16:11:36,072 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:36,072 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:36,073 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:36,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:36,074 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2019-09-16 16:11:36,074 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:36,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:36,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:36,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:36,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:36,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:36,141 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-16 16:11:36,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:36,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-16 16:11:36,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:36,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:36,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2019-09-16 16:11:36,183 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-16 16:11:36,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-16 16:11:36,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-16 16:11:36,184 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-09-16 16:11:36,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:36,218 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2019-09-16 16:11:36,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-16 16:11:36,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-09-16 16:11:36,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:36,220 INFO L225 Difference]: With dead ends: 28 [2019-09-16 16:11:36,220 INFO L226 Difference]: Without dead ends: 20 [2019-09-16 16:11:36,221 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-16 16:11:36,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-16 16:11:36,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-16 16:11:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-16 16:11:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-09-16 16:11:36,229 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2019-09-16 16:11:36,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:36,232 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-09-16 16:11:36,232 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-16 16:11:36,233 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-09-16 16:11:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-16 16:11:36,234 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:36,234 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:36,235 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:36,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:36,235 INFO L82 PathProgramCache]: Analyzing trace with hash 370288085, now seen corresponding path program 2 times [2019-09-16 16:11:36,235 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:36,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:36,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:36,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:36,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-16 16:11:36,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:36,453 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-16 16:11:36,473 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:36,490 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:11:36,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:11:36,491 WARN L254 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-16 16:11:36,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:36,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:11:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:36,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:36,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2019-09-16 16:11:36,687 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-16 16:11:36,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-16 16:11:36,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2019-09-16 16:11:36,688 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 19 states. [2019-09-16 16:11:37,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:37,046 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2019-09-16 16:11:37,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-16 16:11:37,046 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2019-09-16 16:11:37,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:37,047 INFO L225 Difference]: With dead ends: 38 [2019-09-16 16:11:37,047 INFO L226 Difference]: Without dead ends: 26 [2019-09-16 16:11:37,048 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2019-09-16 16:11:37,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-16 16:11:37,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-09-16 16:11:37,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-16 16:11:37,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-09-16 16:11:37,057 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2019-09-16 16:11:37,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:37,058 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-09-16 16:11:37,058 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-16 16:11:37,058 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-09-16 16:11:37,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-16 16:11:37,060 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:37,060 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:37,060 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:37,061 INFO L82 PathProgramCache]: Analyzing trace with hash 66146485, now seen corresponding path program 2 times [2019-09-16 16:11:37,061 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:37,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:37,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:37,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:11:37,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-16 16:11:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-16 16:11:37,137 INFO L474 BasicCegarLoop]: Counterexample might be feasible [2019-09-16 16:11:37,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 04:11:37 BoogieIcfgContainer [2019-09-16 16:11:37,175 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-16 16:11:37,180 INFO L168 Benchmark]: Toolchain (without parser) took 2796.74 ms. Allocated memory was 131.6 MB in the beginning and 214.4 MB in the end (delta: 82.8 MB). Free memory was 83.0 MB in the beginning and 88.5 MB in the end (delta: -5.5 MB). Peak memory consumption was 77.4 MB. Max. memory is 7.1 GB. [2019-09-16 16:11:37,182 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 131.6 MB. Free memory was 101.3 MB in the beginning and 101.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-09-16 16:11:37,184 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.62 ms. Allocated memory is still 131.6 MB. Free memory was 82.8 MB in the beginning and 73.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-09-16 16:11:37,190 INFO L168 Benchmark]: Boogie Preprocessor took 117.80 ms. Allocated memory was 131.6 MB in the beginning and 197.7 MB in the end (delta: 66.1 MB). Free memory was 73.6 MB in the beginning and 175.4 MB in the end (delta: -101.8 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2019-09-16 16:11:37,191 INFO L168 Benchmark]: RCFGBuilder took 231.04 ms. Allocated memory is still 197.7 MB. Free memory was 175.4 MB in the beginning and 163.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2019-09-16 16:11:37,192 INFO L168 Benchmark]: TraceAbstraction took 2182.94 ms. Allocated memory was 197.7 MB in the beginning and 214.4 MB in the end (delta: 16.8 MB). Free memory was 163.5 MB in the beginning and 88.5 MB in the end (delta: 75.1 MB). Peak memory consumption was 91.8 MB. Max. memory is 7.1 GB. [2019-09-16 16:11:37,200 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 131.6 MB. Free memory was 101.3 MB in the beginning and 101.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.62 ms. Allocated memory is still 131.6 MB. Free memory was 82.8 MB in the beginning and 73.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.80 ms. Allocated memory was 131.6 MB in the beginning and 197.7 MB in the end (delta: 66.1 MB). Free memory was 73.6 MB in the beginning and 175.4 MB in the end (delta: -101.8 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 231.04 ms. Allocated memory is still 197.7 MB. Free memory was 175.4 MB in the beginning and 163.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2182.94 ms. Allocated memory was 197.7 MB in the beginning and 214.4 MB in the end (delta: 16.8 MB). Free memory was 163.5 MB in the beginning and 88.5 MB in the end (delta: 75.1 MB). Peak memory consumption was 91.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=0, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=1, n=2, n=4] [L15] COND FALSE !(i==4) VAL [i=1, n=4, n=2] [L13] i++ VAL [i=2, n=4, n=2] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=2, n=4, n=4] [L15] COND FALSE !(i==4) VAL [i=2, n=4, n=4] [L13] i++ VAL [i=3, n=4, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=3, n=4, n=6] [L15] COND FALSE !(i==4) VAL [i=3, n=6, n=4] [L13] i++ VAL [i=4, n=4, n=6] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=4, n=8, n=4] [L15] COND TRUE i==4 [L15] sn=-10 VAL [i=4, n=-10, n=4] [L13] i++ VAL [i=5, n=4, n=-10] [L13] COND FALSE !(i<=n) VAL [i=5, n=4, n=-10] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNSAFE Result, 2.1s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 59 SDtfs, 18 SDslu, 174 SDs, 0 SdLazy, 261 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 7806 SizeOfPredicates, 7 NumberOfNonLiveVariables, 117 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 11/36 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...