/usr/bin/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/n.c11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:44:45,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:44:45,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:44:45,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:44:45,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:44:45,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:44:45,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:44:45,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:44:45,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:44:45,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:44:45,713 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:44:45,714 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:44:45,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:44:45,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:44:45,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:44:45,722 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:44:45,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:44:45,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:44:45,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:44:45,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:44:45,739 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:44:45,740 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:44:45,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:44:45,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:44:45,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 17:44:45,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:44:45,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:44:45,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:44:45,780 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 17:44:45,797 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:44:45,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:44:45,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:44:45,800 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:44:45,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:44:45,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:44:45,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:44:45,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:44:45,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:44:45,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:44:45,802 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:44:45,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:44:45,803 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:44:45,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:44:45,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:44:45,804 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:44:45,804 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:44:45,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:44:45,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:44:45,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:44:45,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:44:45,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:44:45,805 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:44:46,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:44:46,317 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:44:46,323 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:44:46,326 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:44:46,327 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:44:46,328 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c [2020-09-04 17:44:46,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/100eff6c1/cfd343d978f7408ea809d2c0d55f29a0/FLAG268c1caee [2020-09-04 17:44:46,972 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:44:46,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/n.c11.c [2020-09-04 17:44:46,980 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/100eff6c1/cfd343d978f7408ea809d2c0d55f29a0/FLAG268c1caee [2020-09-04 17:44:47,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/100eff6c1/cfd343d978f7408ea809d2c0d55f29a0 [2020-09-04 17:44:47,326 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:44:47,328 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:44:47,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:44:47,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:44:47,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:44:47,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:44:47" (1/1) ... [2020-09-04 17:44:47,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a2ded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:47, skipping insertion in model container [2020-09-04 17:44:47,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:44:47" (1/1) ... [2020-09-04 17:44:47,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:44:47,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:44:47,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:44:47,615 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:44:47,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:44:47,650 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:44:47,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:47 WrapperNode [2020-09-04 17:44:47,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:44:47,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:44:47,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:44:47,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:44:47,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:47" (1/1) ... [2020-09-04 17:44:47,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:47" (1/1) ... [2020-09-04 17:44:47,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:47" (1/1) ... [2020-09-04 17:44:47,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:47" (1/1) ... [2020-09-04 17:44:47,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:47" (1/1) ... [2020-09-04 17:44:47,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:47" (1/1) ... [2020-09-04 17:44:47,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:47" (1/1) ... [2020-09-04 17:44:47,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:44:47,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:44:47,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:44:47,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:44:47,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 17:44:47,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:44:47,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:44:47,871 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:44:47,871 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:44:47,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:44:47,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:44:47,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-04 17:44:47,872 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:44:47,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:44:47,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:44:48,093 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:44:48,094 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 17:44:48,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:44:48 BoogieIcfgContainer [2020-09-04 17:44:48,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:44:48,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:44:48,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:44:48,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:44:48,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:44:47" (1/3) ... [2020-09-04 17:44:48,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35ab5f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:44:48, skipping insertion in model container [2020-09-04 17:44:48,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:47" (2/3) ... [2020-09-04 17:44:48,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35ab5f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:44:48, skipping insertion in model container [2020-09-04 17:44:48,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:44:48" (3/3) ... [2020-09-04 17:44:48,111 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c11.c [2020-09-04 17:44:48,123 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:44:48,134 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:44:48,156 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:44:48,184 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:44:48,184 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:44:48,184 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:44:48,184 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:44:48,184 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:44:48,185 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:44:48,185 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:44:48,185 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:44:48,202 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-09-04 17:44:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-04 17:44:48,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:48,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:44:48,218 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:48,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:48,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1430370880, now seen corresponding path program 1 times [2020-09-04 17:44:48,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:48,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335255256] [2020-09-04 17:44:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:48,317 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:48,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:48,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335255256] [2020-09-04 17:44:48,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:48,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 17:44:48,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311342404] [2020-09-04 17:44:48,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 17:44:48,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:48,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 17:44:48,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 17:44:48,419 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-09-04 17:44:48,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:48,447 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-09-04 17:44:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 17:44:48,449 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-04 17:44:48,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:48,458 INFO L225 Difference]: With dead ends: 40 [2020-09-04 17:44:48,459 INFO L226 Difference]: Without dead ends: 21 [2020-09-04 17:44:48,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 17:44:48,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-04 17:44:48,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-04 17:44:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-04 17:44:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-04 17:44:48,515 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 12 [2020-09-04 17:44:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:48,515 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-04 17:44:48,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 17:44:48,516 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-04 17:44:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 17:44:48,517 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:48,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:44:48,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:44:48,518 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:48,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:48,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1911322683, now seen corresponding path program 1 times [2020-09-04 17:44:48,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:48,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054454252] [2020-09-04 17:44:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:48,521 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:48,865 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2020-09-04 17:44:48,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:48,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054454252] [2020-09-04 17:44:48,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:48,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 17:44:48,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231790454] [2020-09-04 17:44:48,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 17:44:48,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:48,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 17:44:48,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:44:48,892 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-09-04 17:44:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:49,011 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-09-04 17:44:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 17:44:49,012 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-04 17:44:49,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:49,014 INFO L225 Difference]: With dead ends: 45 [2020-09-04 17:44:49,014 INFO L226 Difference]: Without dead ends: 27 [2020-09-04 17:44:49,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:44:49,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-04 17:44:49,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-09-04 17:44:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-04 17:44:49,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-04 17:44:49,038 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 13 [2020-09-04 17:44:49,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:49,039 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-04 17:44:49,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 17:44:49,039 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-04 17:44:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-04 17:44:49,041 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:49,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:44:49,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:44:49,042 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:49,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:49,043 INFO L82 PathProgramCache]: Analyzing trace with hash -4953541, now seen corresponding path program 1 times [2020-09-04 17:44:49,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:49,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687720449] [2020-09-04 17:44:49,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:49,090 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:49,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:49,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687720449] [2020-09-04 17:44:49,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:49,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 17:44:49,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025485113] [2020-09-04 17:44:49,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 17:44:49,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:49,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 17:44:49,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 17:44:49,311 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-09-04 17:44:49,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:49,440 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-09-04 17:44:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 17:44:49,440 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-04 17:44:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:49,441 INFO L225 Difference]: With dead ends: 52 [2020-09-04 17:44:49,442 INFO L226 Difference]: Without dead ends: 34 [2020-09-04 17:44:49,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-04 17:44:49,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-04 17:44:49,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-09-04 17:44:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-04 17:44:49,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-09-04 17:44:49,452 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 20 [2020-09-04 17:44:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:49,453 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-09-04 17:44:49,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 17:44:49,453 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-09-04 17:44:49,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 17:44:49,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:49,454 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:44:49,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:44:49,455 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:49,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:49,456 INFO L82 PathProgramCache]: Analyzing trace with hash 628881157, now seen corresponding path program 2 times [2020-09-04 17:44:49,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:49,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187618174] [2020-09-04 17:44:49,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:49,463 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:49,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:49,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:49,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187618174] [2020-09-04 17:44:49,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:49,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 17:44:49,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924189958] [2020-09-04 17:44:49,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 17:44:49,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:49,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 17:44:49,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-04 17:44:49,663 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2020-09-04 17:44:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:49,836 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-09-04 17:44:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 17:44:49,836 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-09-04 17:44:49,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:49,838 INFO L225 Difference]: With dead ends: 66 [2020-09-04 17:44:49,838 INFO L226 Difference]: Without dead ends: 41 [2020-09-04 17:44:49,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-09-04 17:44:49,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-04 17:44:49,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-09-04 17:44:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-04 17:44:49,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-09-04 17:44:49,849 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 27 [2020-09-04 17:44:49,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:49,849 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-09-04 17:44:49,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 17:44:49,850 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-09-04 17:44:49,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 17:44:49,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:49,851 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:44:49,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:44:49,852 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:49,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1577865979, now seen corresponding path program 3 times [2020-09-04 17:44:49,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:49,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641970628] [2020-09-04 17:44:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:49,859 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:50,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:50,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641970628] [2020-09-04 17:44:50,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:50,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-04 17:44:50,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308867840] [2020-09-04 17:44:50,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 17:44:50,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:50,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 17:44:50,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-04 17:44:50,075 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 11 states. [2020-09-04 17:44:50,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:50,364 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2020-09-04 17:44:50,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 17:44:50,366 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-09-04 17:44:50,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:50,367 INFO L225 Difference]: With dead ends: 80 [2020-09-04 17:44:50,368 INFO L226 Difference]: Without dead ends: 48 [2020-09-04 17:44:50,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-04 17:44:50,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-04 17:44:50,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-09-04 17:44:50,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 17:44:50,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-04 17:44:50,383 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 34 [2020-09-04 17:44:50,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:50,384 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-04 17:44:50,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 17:44:50,384 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-04 17:44:50,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 17:44:50,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:50,385 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:44:50,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 17:44:50,386 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:50,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:50,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1087419973, now seen corresponding path program 4 times [2020-09-04 17:44:50,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:50,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326975744] [2020-09-04 17:44:50,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:50,393 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:50,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:50,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326975744] [2020-09-04 17:44:50,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:50,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-04 17:44:50,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060184135] [2020-09-04 17:44:50,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 17:44:50,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:50,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 17:44:50,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-09-04 17:44:50,697 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 13 states. [2020-09-04 17:44:51,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:51,059 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-09-04 17:44:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 17:44:51,059 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-09-04 17:44:51,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:51,063 INFO L225 Difference]: With dead ends: 62 [2020-09-04 17:44:51,063 INFO L226 Difference]: Without dead ends: 56 [2020-09-04 17:44:51,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-09-04 17:44:51,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-04 17:44:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-09-04 17:44:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-04 17:44:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-09-04 17:44:51,082 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 41 [2020-09-04 17:44:51,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:51,082 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-09-04 17:44:51,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 17:44:51,084 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-09-04 17:44:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-04 17:44:51,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:51,086 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:44:51,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 17:44:51,086 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:51,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1795298373, now seen corresponding path program 5 times [2020-09-04 17:44:51,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:51,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125445249] [2020-09-04 17:44:51,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:51,098 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:51,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:51,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125445249] [2020-09-04 17:44:51,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:51,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-04 17:44:51,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442828827] [2020-09-04 17:44:51,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 17:44:51,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:51,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 17:44:51,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-04 17:44:51,329 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 11 states. [2020-09-04 17:44:51,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:51,594 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-09-04 17:44:51,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 17:44:51,595 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-09-04 17:44:51,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:51,596 INFO L225 Difference]: With dead ends: 79 [2020-09-04 17:44:51,596 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 17:44:51,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-09-04 17:44:51,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 17:44:51,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 17:44:51,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 17:44:51,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 17:44:51,598 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-09-04 17:44:51,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:51,599 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 17:44:51,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 17:44:51,599 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 17:44:51,599 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 17:44:51,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 17:44:51,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 17:44:52,180 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 17:44:52,180 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 17:44:52,180 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 17:44:52,180 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 17:44:52,180 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 17:44:52,181 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 17:44:52,181 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 12 32) the Hoare annotation is: true [2020-09-04 17:44:52,181 INFO L264 CegarLoopResult]: At program point L21(lines 21 22) the Hoare annotation is: (or (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 2) (< 0 (+ (div main_~len~0 4294967296) 1))) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2020-09-04 17:44:52,181 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 22) the Hoare annotation is: (or (and (<= main_~len~0 1) (<= 1 main_~len~0)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= main_~len~0 0) (<= 0 main_~len~0)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2020-09-04 17:44:52,182 INFO L264 CegarLoopResult]: At program point L19-1(line 19) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2020-09-04 17:44:52,182 INFO L264 CegarLoopResult]: At program point L19-3(line 19) the Hoare annotation is: (or (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 2) (< 0 (+ (div main_~len~0 4294967296) 1))) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2020-09-04 17:44:52,182 INFO L264 CegarLoopResult]: At program point L19-4(lines 19 27) the Hoare annotation is: (or (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 2) (< 0 (+ (div main_~len~0 4294967296) 1))) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2020-09-04 17:44:52,183 INFO L264 CegarLoopResult]: At program point L19-5(lines 19 27) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2020-09-04 17:44:52,183 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 12 32) the Hoare annotation is: true [2020-09-04 17:44:52,183 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 32) the Hoare annotation is: true [2020-09-04 17:44:52,183 INFO L271 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: true [2020-09-04 17:44:52,184 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (or (and (<= main_~len~0 1) (<= 1 main_~len~0)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= main_~len~0 0) (<= 0 main_~len~0)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2020-09-04 17:44:52,184 INFO L264 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: (or (and (<= |main_#t~post1| 0) (<= main_~len~0 0) (<= 0 |main_#t~post1|) (<= 0 main_~len~0)) (and (<= |main_#t~post1| 1) (<= 1 |main_#t~post1|) (<= main_~len~0 1) (<= 1 main_~len~0)) (and (<= 2 |main_#t~post1|) (<= |main_#t~post1| 2) (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= |main_#t~post1| 3) (<= main_~len~0 3) (<= 3 |main_#t~post1|) (<= 3 main_~len~0))) [2020-09-04 17:44:52,184 INFO L264 CegarLoopResult]: At program point L26-2(line 26) the Hoare annotation is: (or (and (<= |main_#t~post1| 3) (<= 3 |main_#t~post1|) (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= |main_#t~post1| 0) (<= main_~len~0 1) (<= 1 main_~len~0) (<= 0 |main_#t~post1|)) (and (<= 2 |main_#t~post1|) (<= |main_#t~post1| 2) (<= main_~len~0 3) (<= 3 main_~len~0)) (and (<= main_~len~0 2) (<= 2 main_~len~0) (<= |main_#t~post1| 1) (<= 1 |main_#t~post1|))) [2020-09-04 17:44:52,184 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (<= 4 main_~len~0) (<= main_~len~0 4)) [2020-09-04 17:44:52,185 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (<= main_~len~0 0) (<= 0 main_~len~0)) [2020-09-04 17:44:52,185 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-09-04 17:44:52,185 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-04 17:44:52,185 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 3 8) the Hoare annotation is: true [2020-09-04 17:44:52,185 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 17:44:52,186 INFO L264 CegarLoopResult]: At program point L4(lines 4 6) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 17:44:52,186 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 17:44:52,186 INFO L271 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2020-09-04 17:44:52,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 05:44:52 BoogieIcfgContainer [2020-09-04 17:44:52,211 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 17:44:52,214 INFO L168 Benchmark]: Toolchain (without parser) took 4885.50 ms. Allocated memory was 141.6 MB in the beginning and 242.2 MB in the end (delta: 100.7 MB). Free memory was 105.9 MB in the beginning and 161.1 MB in the end (delta: -55.2 MB). Peak memory consumption was 103.2 MB. Max. memory is 7.1 GB. [2020-09-04 17:44:52,215 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 141.6 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-04 17:44:52,216 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.44 ms. Allocated memory is still 141.6 MB. Free memory was 105.7 MB in the beginning and 96.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:44:52,217 INFO L168 Benchmark]: Boogie Preprocessor took 120.14 ms. Allocated memory was 141.6 MB in the beginning and 203.4 MB in the end (delta: 61.9 MB). Free memory was 96.2 MB in the beginning and 182.2 MB in the end (delta: -86.0 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-09-04 17:44:52,218 INFO L168 Benchmark]: RCFGBuilder took 327.28 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 170.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:44:52,219 INFO L168 Benchmark]: TraceAbstraction took 4110.71 ms. Allocated memory was 203.4 MB in the beginning and 242.2 MB in the end (delta: 38.8 MB). Free memory was 169.5 MB in the beginning and 161.1 MB in the end (delta: 8.4 MB). Peak memory consumption was 104.9 MB. Max. memory is 7.1 GB. [2020-09-04 17:44:52,223 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 141.6 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.44 ms. Allocated memory is still 141.6 MB. Free memory was 105.7 MB in the beginning and 96.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.14 ms. Allocated memory was 141.6 MB in the beginning and 203.4 MB in the end (delta: 61.9 MB). Free memory was 96.2 MB in the beginning and 182.2 MB in the end (delta: -86.0 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 327.28 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 170.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4110.71 ms. Allocated memory was 203.4 MB in the beginning and 242.2 MB in the end (delta: 38.8 MB). Free memory was 169.5 MB in the beginning and 161.1 MB in the end (delta: 8.4 MB). Peak memory consumption was 104.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: ((4 <= len && len <= 4) || (len <= 2 && 0 < len / 4294967296 + 1)) || (len <= 3 && 3 <= len) - ProcedureContractResult [Line: 12]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 3]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 7, TraceHistogramMax: 5, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 154 SDtfs, 91 SDslu, 778 SDs, 0 SdLazy, 619 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 18 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 28 LocationsWithAnnotation, 88 PreInvPairs, 155 NumberOfFragments, 306 HoareAnnotationTreeSize, 88 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 28 FomulaSimplificationsInter, 215 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...